For the family home it's not something easily integrated. At a young age it's fine, at a technical standpoint, as well. But the challenged is where it's a hard sell. And if one system is used by all Windows 7 is the winning recipient at the moment.
It will take time to push it to the forefront, and MS is trying to be like every other market and get people to upgrade. They'll make it harder to stay behind when they release DirectX 11.1. These are what aggravate developers. They aren't scared but some look at alternatives. See the Beta tests of Steam.

