I have all three and last gen I had no want for a wii so I had the ps3 and 360. The problem is there is always exclusives like halo and uncharted I need to play. The biggest problem this time around is that I now I have to pay $100 a year for online for the 2 of them. This gen to be honest the only one I'm a having a lot of fun with is the WII U and I haven't had a nintendo product since the N64.
The other probelm I'm going to run into is finding time for all the games in the next few years. The most fun I've had with my ps4 is playing for the first time the last of us. That game was stellar.