I actually don't have a 360 yet, and probably won't be getting one until they get their hardware really working (moving to smaller fabrication lines) but Revolution is something I'll probably buy the moment it's out. Why? Just look at it ... must be the single prettiest console ever! Then there's of course the issue of revolutionizing videogames as we know them. Time only knows if the promise holds true, though.
PS3 doesn't interest games-wise one bit (Killzone as a brand has about as much appeal as Deer Hunter to me... And no, Deer Hunter does NOT appeal:) , but it might be useful as a blueray-player, and of course the hardware IS quite interesting.
I wish someone would come up with cross-compatible gamepads, meaning you could use the same wireless controllers in both 360 and PS3. I would pay double for that, just for not having a zillion different pads hanging around...