Microsoft's Windows will be a flash in the pan, when computing history is looked upon future generations.
-Coward
Thats quite an overstatement. I certainly think Microsoft is here to stay for two reasons: 1)It has the largest market share of personal PCs. 2)It has the largest research budget of any technology company.
I think (2) is perhaps the most important. Microsoft is able to pay a team of researchers 300K a year to work on what ever they feel like. The researchers are not restricted to windows, either.
For this reason alone, I feel that microsoft is here to stay.