Even though I own a PS3 and 360, I have no interest in either one's successor. I can't imagine the graphics being that
much better, and there's not a new media...erm...medium coming that will be in the new system (i.e. DVD w/ Ps2, Blu w/ PS3). Also, I'm content with my system from this generation being the WiiU. Plus, I imagine the PS3/360 will still have support for a few years to go anyway.
But, there's always the chance the NextBox could surprise me, and I'll be watching to see what happens regardless.