I have Wii U, 360 and PS3.
I'll stick to buying multiplats for ps3 as it is the easiest system to move between rooms. You only need a standard power cable and hdmi cable in each room, no external power brick or other stuff to move around.
When it was suggested multiplats would run in 1080p on WiiU I was looking forward to playing them on that. Since that didn't happen I'll stick to the convenience of the ps3 for now.