What games do you want to play?
Are they console exclusives? ==> buy that console
Is it an online game where most of the players are on a console? ==> buy that console
I have a PC, PS2, PS3, 360 because each has games I want to play. The PS4 and X1 do not have any exclusive games that I want to play yet, so I do not have either one.
I care about the games first, the device second. If the game is on PC I get it there because I have a better gaming PC than the 360/PS3.
This. The reason why I stuck with PC and Nintendo, their software options come first. Same why (on a similar, off topic note) tablets for the longest time never appealed to me, and my interest in one started with a Kindle Fire (I wanted to read books and have a "f-ck disk swapping" use with books and reading).
My computing tools are out of need, and a few steps into the future need. The OP is asking this out of pure gaming political tastes and possibly enticing one.
What do you want to accomplish, today and tomorrow, and decide on one, budget pending of course. I can say the same to just about ANY ACQUISITION of anything, from consumer level products, to private corporations, to government things.