It's time to tell the RIAA and MPAA companies that enough is enough, and to curb their power to turn participatory culture into mere consumerism by putting an end to never-ending copyright terms.
I'm all for this. How do we do it? Especially if they're even half as entwined with the government as the tin foils suggest...
I think this functionality depends on how the game is implemented, rather than what Steam can do about it.
Truth. Dungeon defenders can play multiple players on one PC with only one copy of the game. Of course, you need controllers for the additional players, but that's beside the point.
Microsoft wont blame themselves for any difference between actual and total expected sales. They'll just prefer to blame the console market for being dead.
The only figure that will force MS to face reality is the actual difference between Xbox One and PS4 sales.
Oh, no. They'll find a way to blame piracy as well. Especially if the console gets rooted as per some comment above.