well I have a concentration in Financial market with my MBA.... the problem with a lot of investors is, they are mostly running numbers, with very little regard to the business itself (I summarize here of course) but that's how all those bubbles happen...
how many times have you seen a stock go up in a market you know very well and in your head it didn't make any sense because the product or service that specific company offer are not of good quality or something is obviously broken.... those things, numbers don't tell... especially in the dotcom universe or software....
So while I'm dead convince that a company like MS that want to stay in business in the mass market software and computer/tech world need to have hardware integration (a la apple) I'm not sure it is the feeling investors have... and they couldn't care less if it goes business only as long as the company is healthy and generates profit...
but looking at how well receive the restructuration has been.. I doubt they'll revert that and I'm sure it wouldn't be good to flip flop every month with restructuration as massive as those every quarter or so....
and one big element we are forgetting... Mister Bill Gates himself.... he is not only chairman of MS but he is the biggest stock holder with 7-10% of the shares (couldn't find a definitive number in the 2 minutes search I did)... so if 1% is relevant, what about him??? and I'm sure he has strong allies too...