There's testing that needs to be done, code that needs to be rewritten, etc. It's not impossible, but that's not even the biggest problem.
Microsoft is a gargantuan company run by a stifling bureaucracy. It takes weeks or months to get any kind of strategic decision proposed, let alone approved by the dark council that oversees these things.
I mean, we're talking about the company that still runs XBLA Marketplace with policies developed in the pre-app store world of 2005. And there isn't even any coding involved there - it's all strategic decision-making that has, apparently, never happened or never managed to convince anyone important.
Technically he's probably not too far off. But, like I said, that's not the problem - it's convincing management to change their strategy after spending months and years planning all this stuff out.