On the subject of used games, Microsoft says "game publishers can enable you to trade in your games at participating retailers," and that the company "does not charge a platform fee to retailers, publishers, or consumers for enabling transfer of these games." However, publishers can opt in or out of game resales and are free to set up transfer fees with retailers. Games can also be given to friends via their discs. There are no fees associated with the transfer, but you can only pass them to friends who have been on your Xbox list for at least 30 days and each game can only be transfered once.
There's more about the possibility of loaning discs, and about how often your Xbox will need to connect to the Internet (short version: once a day, more if you're using someone else's console). Try explaining this stuff to a regular person and their kid in a store. It's almost as if appealing to serious gamers means you can assume a high level of understanding of/tolerance for DRM.
It didn't work for music, it's not working for books, and it's unlikely to work here too.