Microsoft is Dead 19 years ago
MS may be past their peak but they're certainly not dead and won't be while they've still got large corporations willing to buy their software.
Some of your arguments just don't hold water, at one point you're arguing the desktop is dead but then oh one of the reasons MS is in trouble is Apple's desktop?
Web based applications may be on the rise but there are plenty of problems with them too, disconnected operation, lack of backups etc. being some of them.
The platform of the future is the phone - you've only got to look at how it's used to fuel innovation in some of the third world countries.