Microsoft's domination was achieved by making passable-to-excellent browsers in the beginning and putting them on the desktop, which made the web more accessible to millions of people, boosted commerce, and pushed feature development forward much more quickly than Netscape (or any company) would have done absent competition. Bigger market, bigger pie, more investment, more jobs, more consumers.
Netscape died, of course. But it didn't have to be that way; and Microsoft won far more than Netscape lost.