I said something similar for PS and price yesterday, and I'll say it for Xbox today.
Do you really think the team behind the turnaround of the Xbox brand, a bunch of great initiatives, and the One X, is just going to make a move like this without carefully considering it?
They have had this up and running, and have likely measured out and addressed every possible pitfall, for years before ever committing to something like this.
I don't see Microsoft handing over the current graphics king title and attaching an anchor to themselves. I don't see Microsoft erasing the progress they've made in being likable. And I certainly don't see Don Mattrick anywhere.
Have a little faith. If not in them, then basic capalitism. This team isn't out to crash their own brand, especially not during the first chance they've had to change their fortunes in 7 years, and any decision made, is being made because they feel they can pull it off.
We'll see shortly, if the rumors are true, in any case.