I've really been underwhelmed by what the I've seen for the next-gen systems. Sure, the graphics are amazing, but all the games look so derivative and unoriginal. My theory is that this will just get worse with the next-gen games; since they will cost more money and take more time to produce, publishers will be less willing to take risks (ie, innovate).
The revolution has caught my eye with its emphisis on creativity rather than power. I'm curious to see what Nintendo does with its controller and downloadable games. Utimately, though, I will go with the system that has the largest game library. If the past is any indictation, that will probably be the PS3.
Until then, I'm more than happy with my PC and PS2.