Multiple users and devices on one account
Add the ability for multiple users and devices on one account, so that games and apps can be purchased once for all users/devices. Currently, games have to be purchased on each device.
Adding this change will drive sales-per-household for devices instead of the one-per-household trend and allow all account users within the household to utilize games purchased on one account.
The idea here would be similar to multiple people (up to four) playing a game on a console.
While many multi-player games currently don't have the option to choose which online friends to play with, there are some that do and I anticipate more developers going that route, as well, in order to make it a more social experience with friends (Thus driving sales even more because people generally want to play games with their friends).