Xbox One live features:
1. Better matchmaking with Smart Match.
You guys just eat this propaganda for breakfast I've seen countless games this gen get their matchmaking improved via title updates yet somehow matchmaking is still not up to par and now requires a whole new console hardware to be improved?? Please.
2. No jerks - reputation system helps keep annoying players out of your games.
How is this different from the reputation system on 360??
3. No waiting in lobbies - play, watch TV, or surf the web while matchmaking happens.
That's a next gen feature possible because of improved hardware. This is a feature that works independent of Xbox Live. You could basically swap out matchmaking with loading or w/e and it'll be the same.
Just to name a few.
http://www.xbox.com/en-US/xbox-one/get-the-facts?xr=shellnav
P.S. Dedicated servers available to all devs.