The Wii is a game cube with a new interface, no updated graphics, but a kick to play. Beware of non-impact stress injuries. (graphics are the real drawback)
The XBOX and PS3 are OS based systems, both blue tooth compatible.
Playability is similar, although I think sony has better play/viewing, kids today will differ. I think Sony has just been in it systems longer.
it has become a VHS vs. Beta, Ford vs. Chevy, Mac vs. IBM, Blu-RAY vs. HD-DVD, Plasma vs. LCD type of war.
Both systems are designed, not solely for gameplay, but for speculation on media delivery.
They both will provide content on and from the internet. Right now Sony doesn't charge for somethings the Xbox does. But that could change now that Sony/Disney won the Blu-ray war.
The kicker for the PS3 is the absolute 1080P resolution with update able software and as a Blu-Ray player. Many older (not THAT old) Blu-ray players are already unable to process the latest Blu-ray versions. The PS3 just download and installs a new OS as available. The last update upscales normal DVD's to give an incredible picture.
oh yeah, you'll probably want a Plasma now...(LCD) no, plasma (LCD!!!!)
true 1080P is a must. You won't regret that regardless of system.
PlayStation 3 vs. Xbox 360: Tech Head-to-Head - GameSpot Tech - Computers, Video Cards, Monitors, Laptops, Cell Phones, Home Theater and more
In case you need a poll vote.... PS3.