User blog comment:Lancer1289/MICROSOFT PROVES IT LISTENS!!!!!/@comment-1440333-20130711033303/@comment-1440333-20130711093541

It is optional, but I believe most of the biggest games, such as Halo 5, Dead Rising 3, and several others - would all have made use of it.

The fact is that it is a really radical idea for home console gaming, but takes a lot of the strengths of PC gaming, a much stronger market, and applies them in a relevant way to consoles. It was perhaps a bit to stringent but people merely overreacted to such a radical change, not even waiting for release before attacking it mercilessly, which Sony also did, despite the fact that the PS4 has similar technology, meaning thirdparty games on BOTH consoles can make full use of any DRM features they wish to protect their investment.