it seems silly to want to kill off stuff that is just starting to hold its own. Xbox and Bing are just starting to generate profit. It would be a waste of money and effort to nurture this stuff from nothing and then kill it or sell it off to somebody elses benefit.
As far as surface... I'm torn. Personally, I think the device is a joke. However, the market is clearly moving away from the tradition pc setup to a more mobile tablet/phone market. Third parties haven't been having a lot of luck pushing the windows os in that market and are starting to gravitate more towards android. So obviously microsoft needs to do something about it or long term they are going to fade away. Microsoft needs to innovate and do something new in this space if they want to compete, not just follow. If they do that with their surface line, fine, but as of now the line is junk...