Revolution looks awesome, so far. I love the design. Personally, I think it's the best-looking of the three. The PS3 looks like a printer and the controller is an abomination. Seriously, there was nothing wrong with the dual-shock design. Why the change? XBox 360 has an awesome controller, but I'm not terribly keen on the actual console. It looks like a PC tower. No real character or uniqueness to it.
However, the look of the hardware doesn't clue anybody in as to the nature of the console's "revolutionary" functionality, and we still haven't seen the controller. I'm definitely excited for it, but not 100% sold on it yet. Hopefully, the coming months will reveal more information about the system's real capabilities.