: 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.

: You (the owner) can play your game at any time, plus one member of your
: 'family'.

Yes, but they could easily interpret that stuff in a way that would force a single copy of a game to only be accessible by one person at a time, i.e. you'd still have to double-dip if you wanted to run the game simultaneously on multiple boxes. Such a policy wouldn't surprise me one bit.

And...

: I don't know if it means that only one other person can access the library at
: once, or if only one other person can play a particular title at once. The
: former would still be pretty great, but the latter would be even more
: awesome.

...the chance that ten people will be able to play simultaneously from a single library is approximately zero. That would cause Microsoft's digital system, which has long been the worst-priced source for anything ever, to suddenly become astronomically more generous than Steam.

Not. Happening.