I am as sceptical as the next guy when it comes to these news but the "she's not a gamer" angle ain't it. Its nice that Phil was a gamer, but that didn't stop him and the organization around him from making some very questionable decisions around Xbox, and I am pretty sure that her being a certified gamer (tm) or not will not be the reason why Xbox and Microsoft will succeed or fail.
Hoping for the best, even though currently there's many more questions than convincing answers.