Apple still king of all-in-one's

The new iMac has gotten a bit of a face lift with it's slick Aluminum design. It still comes fully loaded with built-in features like a camera, microphone, speakers, and a slot loading CD/DVD drive with burning capability. Like all Mac's, it has the iLife suite, which gives you great options for your pictures, audio, and video needs.
The computer has more than enough juice for everyday computing tasks (web browsing, word documents, spreadsheets, etc.). It runs more CPU intensive tasks without any hiccups and multitasking is a breeze.
Upgrading memory is a cinch with an easy access slot at the bottom of the screen.

The computer can run Windows for those who certain Windows only applications or games. I was able to play some modern games (Rainbow Six Vegas, Call of Duty) in boot cam with no problems. The games themselves looked gorgeous on the 20" inch screen.

The keyboard seemed to be getting mixed reviews early on but I've found it to be excellent. It is very similar to the Macbook keyboard to give you an idea of what you'll get. Unfortunately, it also comes with the clunky Mighty Mouse which has a few design flaws.

The screen is covered in glass which may be a problem if you're in a well lit room. I actually have my iMac in a room with tons of windows and I haven't found the glare to be too much of a nuisance but your miles may vary.

Upgradability is limited to RAM and possibly the hard drive. However, if you're in the market for an all-in-one that's probably not going to be your top concern. When I was comparing various all-in-one's, I found the iMac had the best price. That rang true especially when you compared the features and software each manufacturer was offering.