The reasons at least I picked ps4 were because you can trade, rent, buy and sell used games. Some people don't do that, I still do and know many that do the same.
I don't want to have a kinnect or eye camera connected to power on the system, I don't use it at all.
I don't want the system connected to online to play single player games. Even if it's just to check in. There have been episodes where Comcast screwed me up and I didn't have internet for 3 days straight.
It's cool to share games with friends but again, you can give xb1 game to your friend and that's it , it's between you and him the money agreement but I bet there will be annotations set on who can access what based on who's activated the game first.
I also don't care much for tv integration. I rarely watch cable tv or have time to. Anything else I can do on the pc or my smartphone. What will be different on xb1 about media streaming that a roku can't do?
If the price drops and I feel like blowing money sure I would try out the system if some bad ass game came along.