The new iMacs boast LED-backlit 21.5- and 27-inch widescreen displays in an edge-to-edge glass design and all aluminum enclosure. They’re available with Intel (INTC) Core 2 Duo processors starting at 3.06 GHz, and Core i5 and i7 quad-core processors for even better performance. The low-end model is priced at $1,199, the same as the past generation, but its high-end sibling is now $200 cheaper, at $1,999.

The new MacBook features an 13.3-inch LED backlit display, a multitouch trackpad, and a $999 price tag. Though still housed in white polycarbonate plastic, it features an updated unibody design borrowed from the MacBook Pro.

The successor to the Mighty Mouse, Magic Mouse, eliminates mechanical buttons, instead, employing the same multitouch surface found on the iPhone, iPod touch, and Mac notebook trackpads, allowing users to navigate their desktops with simple gesture commands.

Accompanying the Magic Mouse is a a new Apple Remote. It’s got a new design and is, predictably, housed in aluminum.

Finally, Apple (AAPL) also updated the Mac mini. While its design is largely identical to that of its predecessor, it offers far more storage. Starting at $599, the entry-level Mac mini features a faster 2.26 GHz Intel Core 2 Duo processor and 2GB of DDR3 1066 MHz memory, a 160GB hard drive, five USB 2.0 ports, FireWire 800, Nvidia GeForce 9400M integrated graphics and a SuperDrive.

There’s also a new $999 Mac mini that’s specially configured with a Mac OS X Snow Leopard Server. It’s outfitted with two 500GB hard drives for a total of 1TB of server storage.

Quite a refresh and one analysts are already crowing about. In a bulletin released after the announcement, Piper Jaffray’s Gene Munster said Apple’s new machines will undoubtedly improve the company’s prospects for the December quarter.

“We expect the new iMacs, and to a lesser degree the new Mac minis, to help the desktop category rebound in the Dec. quarter,” Munster wrote. “In other words, the headwind that existed in the Sept. quarter due to aging Mac desktops has now turned into a tailwind for Mac units in the Dec. quarter….Bottom Line: Street Mac numbers may also be conservative if positive trends continue coupled with new Macs in the quarter.”

That, of course, is because Nvidia (NVDA) feels there’s no need for a resolution. In its opinion, the terms of its licensing agreement with Intel (INTC) do indeed cover the chip giant’s Nehalem processors and other upcoming chips. And it views Intel’s claim that the agreement is otherwise as an effort to hamstring Nvidia’s platform innovations, which Intel sees as a threat to its PC dominance. “We are confident that our license, as negotiated, applies,” said Jen-Hsun Huang, president and CEO of Nvidia. “At the heart of this issue is that the CPU has run its course and the soul of the PC is shifting quickly to the GPU. This is clearly an attempt to stifle innovation to protect a decaying CPU business.”

There’s a lot of emphasis at this unveiling on environmental concerns, reducing the footprint for manufacturing the new notebooks.

Says Ives: “We’ve refined every detail in service of the user.”

Steve Jobs announces that it’s time for Q&A, but with a caveat. No questions about the economy, he says, or Apple’s financial performance because there will be an earnings report next week. And no questions about “my health,” he adds, as a new slide appears on the big screen above him showing his blood pressure.

As the audience laughs, Jobs welcomes Apple COO Tim Cook and Phil Schiller, senior vice president of worldwide marketing, to the stage to take questions from the audience.

Apple (AAPL) does not have an exclusive on the new Nvidia chip, but it will be first to market. “And we’re buying a lot of chips.”

Why no Blu-ray? “Blu-ray is just a bag of hurts,” says Jobs. Apple is waiting things out before “passing that cost burden on to consumers.”

Jobs expects the redesigns to trigger a refresh cycle in both the MacBook and MacBook Pro.

Someone asks why there are no matte screens. Answer: “The vast majority of our customers prefer a glossy finish.”

The 17-inch MacBook Pro is still available, but it has not been refreshed like the other models.

Final question: “Do touchscreens make sense on laptops?” Jobs’s reply: “We’ve experimented with them, but they don’t make a lot of sense to us.”

So no tablet.

And with that, the event is over.

Ives describes how excess aluminum left over from the original piece used in manufacturing is recycled throughout the process. The precision aluminum unibody enclosure that Apple used in the MacBook Air, he notes, is now being extended to the rest of the Mac notebook lineup.

Jobs returns to the stage. He explains that chipmaker Nvidia approached Apple (AAPL) about a new graphics chip that could be used in desktops. Apple decided to adopt it for laptops, however. The chip, called GForce 9400M, delivers graphics up to five times faster than Apple’s current graphics chips.

New notebooks will boast a multi-touch glass trackpad. The entire trackpad is the button.

The trackpad supports multifinger gestures, including some new ones. Four-finger gestures can control AMD app-switching.

A full-glass instant-on LED displays all connectors on one side. The notebooks feature next-gen graphics, mini-display port connector and a magnetic latch.

And they’re environmentally responsible. The unibody design, for example, requires only half the number of parts of Apple’s previous notebooks.

Jobs passes a chassis around the audience, and it is, indeed, very slick. “A tour de force of engineering,” says Jobs. Holding one of these in your hands, it’s tough to disagree.

More coming …