I have the same notion. MS must steer clear of the 'Jobs' be all end all identity.
There are a load of smart heads in each department and I believe it is up to the new CEO to purely oversee and ensure each of these departments are stepping in sync with each other and communicating between divisions. MS is huge and there are many divisions.
Done correctly there is a huge future in Microsoft and it definitely isn't dead in the water just because there's a form factor change. I say GO FOR IT Microsoft! Show the naysayers what you can pull together as far as a mature ecosystem that thrives. The seeds are in place, just pick up the pace a little more.