PC and PS4.
I'm double dipping and buying both versions. I'm getting serious about learning and practicing to become a better Tekken player (hopefully pro someday), and would want the convenience of having the option to play on whatever. I like practicing on monitor 1, while writing down on monitor 2 and maybe watching tutorials, reading or chatting with my fellow Tekken people on monitor 3.
But most times I would probably like to lean back in the sofa and get a few hundred games in, to practice my game against other people, to learn and observe.