The same exact predictions have been made constantly for at least a decade. Meanwhile, their sales are up 150%, their profit is up 200%, and Windows is no longer a required business for the company to survive.

I'm sure they'll have lots of problems going forward. I'm not aware of many companies that don't - what 40 year old technology companies don't have problems? Given that only a few of those exist today, and even less large-scale 40 year old tech companies exist, I'd say Microsoft is doing just fine.