Exactly...
A- Doomed companies fail to foresee the obvious impending future and fail to change...

B- Slowly Failing companies fail to implement said necessary change at the opportune and necessary time...they implement change only at the last moment when writing is on the wall...hence missed out on the profitting of being on the crest of the wave of innovation...and are in jeopardy of failure..

C- Companies that join the herd behind the immediate new wave but aren't the forerunners...usually reap benefits but not the excess that the "point-man" compan(y)ies make....

D- The "point-man" company...innovative...yup...point of strength...and weakness...BB...Commodore...etc...unless they are truly adaptive ...they come and go...

E- the "Walk Hard" Dewey Cox company...a true chameleon always reinventing itself before (or at worst just at the beginning of) trouble...adapting as needed and as well sometimes surprising everybody.

M$ I think is falling into category B...though it may believe otherwise.

Nokia has done an admirable job of survivalistic preservation and innovation...so far...falling almost completely into category E...

But like the old philo question : "How do you judge a good person? Alive or after they have passed?"
While alive they may still muck it up ...even on the death bed.
Dead...well it is a little late to congratulate them ...eh?

With corps....everyone fumbles the ball...everyone eventually goes down..
Best suggestion is wait and see who fumbles the ball worst as they go down...
Do the autopsy rather than biopsy.