To me that's been MS's issue for years though. It's always wait "insert" is coming just hang in there. And it never materializes. I've known die hard MS fans who echo that sentiment. People get tired of being strung along with false hope. Quantity of studios doesn't necessarily translate to quality of games so to date they've proven nothing. I hope for those die hard fans the games come but at this point I personally wouldn't buy a 500-600 Xbox on that premise.
But they've already shown more 1st-party next-gen games than Sony :/ At least two of them being new IP, at that.