As of now, my next-gen machines of choice are/will likely be...
PC:
-A reasonably high-end rig enough to run Battlefield 4 @ 60fps / 1080p / Ultra settings. Plus, enough to run Supermodel, the SEGA Model 3 arcade emu. Gotta be able to play Daytona USA 2 and everything else @ 60fps.
Consoles:
-PS4
-Wii U, maybe. If Nintendo's first-party efforts appeal to me enough, if the price drops and if the non-gaming features and OS speed up/get improved.
side note: IMHO, the first Super Mario Galaxy is the best game Nintendo has ever made, and Twilight Princess is the best Zelda game ever made. Again, all IMO.
Handhelds:
-3DS
As for the XBone....... lolz