It doesn't necessarily have to, but it's a major selling point for me. I spend a lot of time in other parts of my house than the one with my game consoles, so being able to play things other places is a nice feature, especially in the kind of time sink game this is. If I'm really into something the lack of that feature won't stop me, but I'm not really that interested in this. Hell, what I should really do is go back and play ZombiU, which is apparently pretty similar (and ironically enough doesn't include off-TV play).