And in fact the entire company is doomed, no matter what they do.
The best course of action for the new CEO (Stephen Elop?) would be
to break up the company -- spin off the OS and Office divisions.
And in the process, terminate 95% of the execs.
--And likely spin off the odd success like the XBox so investors can profit from it without having it weighed down by all the garbage or having it messed up by misconceived policies like those of the XBox One announcement.