XB1: family "shared games" is the DRM carrot...
Here is the quote from the source:
Give your family access to your entire games library anytime, anywhere: Xbox One will enable new forms of access for families. Up to ten members of your family can log in and play from your shared games library on any Xbox One. Just like today, a family member can play your copy of Forza Motorsport at a friend’s house. Only now, they will see not just Forza, but all of your shared games. You can always play your games, and any one of your family members can be playing from your shared library at a given time.
Now, I may be reading this incorrectly, but it sounds like up to 10 family members can play each others games on any XB1, and that's pretty damn awesome :)
It's going to be interesting to see how strictly Microsoft police who qualifies as "family". I have a feeling if Microsoft allow good mates to share game like this, an overwhelming majority of the gaming community are going to welcome DRM with open arms :D