Yeah the revolution should be very interesting, as should the PS3 XBox 360 is probably too close to a PC to get my interest for the time being, and Halo was always a poor mans UT or Half Life 2 anyway in my book.
The problem with PC power as you put it is that game makers will always tend to develop for middle of the road machines just with the ability to turn up the detail. As fas as FPS games go the PC is the daddy still though, just too bad if you don't like that type of game!