Yeah, controls on the Wii is the big problem. It would probably be a good idea and an awesome marketing strategy if Sony would actually let the user choose a hard drive size, because the system is compatible with 2.5" HDDs.
FAST FACT: The Playstation 3, 60GB version, at the time of the price drop, got a rating increase of 3200% on Amazon.com. Pretty interesting, but then again, they've ceased production of the 60GB version, in favor of the 80GB and 40GB. No hardware emulation, less support for PS2 games, which is one of the weak points, I've got a collection of PS2 games more than the ones on my games list.
To me, liquid cooling is unnecessary unless you're overclocking to 4.0GHz or higher, which is crazy, unless you think you're the hugest gamer and fan of Intel (no offense AMD, I think you'll rise up when you release Phenom). Really long post...
For PS3 vs. Xbox 360, I think if you can afford one of them, then you can probably get the other. Virtual Reality would be a place to mark gaming history if it happens within our lifetimes, since holographic screens/viewing thingys should complete development in 2027, but that's 20 years from now .