What they've shown about stalker 2 looks great. I agree Microsoft should do a better job of marketing it.
That being said, they should do a better job of marketing most of their games lately. I feel like the last marketing campaign that really felt they went all out for was Halo 3. The marketing campaigns don't have to be that large again, but they should be more aggressive.
Halo 4 was also pretty big. That gamr was everywhere. But i agree their campaigns for last generation weren't as big or impactful as the 360 gen.