Why? Because the way Microsoft limits used games and the always on requirement.
The Xbox One has been received with a lot of applause. The only issue that has been spoiling the party was the hints Microsoft made on the always on requirement to play games and the limits they impose on used games. Now Microsoft has published the details on how the Xbox One handles games and it is indeed quite different from the Xbox 360.
When you buy a new game on disc or digital, Microsoft stores a copy of it in the cloud. You then have access to it from any Xbox One and can also share it with your family. This only works when you are online of course. For most the always on requirement is not that problematic. What is clearly the bigger issue is the Xbox One used games concept:
"Trade-in and resell your disc-based games: Today, some gamers choose to sell their old disc-based games back for cash and credit. We designed Xbox One so game publishers can enable you to trade in your games at participating retailers. Microsoft does not charge a platform fee to retailers, publishers, or consumers for enabling transfer of these games. "
This means the game publisher is in control what you can do with your used games. You can give a used game to your friends, but there are these requirements:
"Give your games to friends: Xbox One is designed so game publishers can enable you to give your disc-based games to your friends. There are no fees charged as part of these transfers. There are two requirements: you can only give them to people who have been on your friends list for at least 30 days and each game can only be given once."
Microsoft really might have a big issue here as it is making gamers insecure. Video games are very expensive these days with $60 for must-have titles. To kill the free trade-in and resell market is going to be a big problem for many gamers.