Curiously enough, they have never said that Xbox will not sell, only that it is "not for sale" at this time. They have not even said they have no plans to sell Xbox in the future. They can change their mind at any time, and may very well indeed, so what they've said so far instills no confidence for me.

A common pattern is: gut the company for a fresh start -> have hope for a year or two -> lose hope because you're not seeing profits fast enough and then exit. Microsoft has been known to do this -- remember Nokia?