After at least a year and a half of constant rumors, we finally have concrete answers from Microsoft on how its next console will handle used games, Internet connection requirements, and more. The era of console games being primarily tied to cartridges or discs is indeed over, as Xbox One discs will now be little more than a vestigial form of offline game distribution, a mere means to get initial code onto the hard drives and linked Xbox Live accounts from which they will actually run. The changes Microsoft is making to adjust to this new era show just how tricky the challenge is in threading the needle of user and market expectations.
Developers and publishers have had the used game market in their sights for a while now, so it's not surprising that Microsoft has finally given in to their concerns by providing the option to stop game resales. The Xbox One can't survive without a happy stable of third-party publishers any more than it can survive without a large base of happy gamers, and playing the desires of one group against those of the other has always been a delicate balancing act.
Two main factors have stopped these sorts of used game restrictions on consoles up to now. The first is technology. While there are some Internet-free methods for blocking secondhand game sales, all of them require some sort of proprietary physical media that would add at least a little bit to the distribution cost of both software and hardware. Thanks to Internet ubiquity, this is changing.