I wouldn't buy Xbox One even if my favorite franchises were exclusive to it (Souls, KH, Tekken). Killer Instinct? lol
I really hope Xbox One is a complete failure.
I've never understood the appeal in buying Microsoft consoles anyway. Sony and Nintendo provide faaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaar better 1st party support. 98% of Microsoft titles are shallow/boring.
And all the multi-plat stuff you can buy on Sony's platform anyway. Xbox pretty much thrived on multiplat titles in the past few years. Even Nintendo during Wii's dying moments gave better support to their console (rainfall games, DKCR, Skyward Sword, etc).
I wouldn't buy a competitive game on the Wii U unless I had to for that reason, and because everyone is going to be wireless (ew). Plus the established fighter bases are on PS3/360. I would be playing alone among the GAF membership. I'm cool with the Wii U's current state because I know it won't stay this way. I usually only buy 5-10 games per system, and I've already reached the 5 game points with the Wii U through announced and current titles combined. This was my standard for the PS3 as well. Unfortunately, the XBox 360 only ever had one game I wanted for it, and that's Beyonetta due to a botched port job on the PS3 version. I've never seen anything else worth owning the system for.
I still own an XBox 360 with Kinect ($160 total!), but it's just my wife's Dance Central machine.
The only game I want on Xbox 360 up to this day is Tales of Vesperia. Not interested in anything else.