"He also revealed a little insight into the console's DRM, stating that games will be "locked" to each owners' profile. Of course, that could seriously affect the secondary used games market,..."
Forget the used game market for a moment, let's concentrate on the people with kids, or households that have multiple gamers in the house ranging from 6-90 years old. Unless you're stingy, when you buy a game, everybody in the house plays it. I haven't owned a console since the Dreamcast, but when I go to my fam's house, or friends house, everybody in the house has their own profiles, even I have one. According to Microsoft, if you buy a $60 game, the new Kinect 2.0 logs you in via facial recognition, only then can the game be played, bcuz you're there, present. If you're gone, then the kids, or everybody else in the house is screwed, and they have to buy their own $60 game if they want to play. That's great money for MS, but who wants to buy a game four times, unless they have four 360s in the house, and they all want to game at the same time.
Even logging in the traditional way, when you're at work, other people might want to play the game under their own profile, with their own settings, and achievements. But NOOOOOOO, that takes away from MS profits, and they want to consider that piracy (hint of sarcasm)