Don't bet against Microsoft? Or don't bet on them?
There was a time when everyone knew you didn't bet against Microsoft. If they came into your niche or your industry, you were in trouble. Like them or hate them, you had to respect their ability to dominate everything they touched.
But now? Are they still the same force? As this article shows, they bungled virtualisation. They bungled Vista - years late, buggy as hell, slated by analysts. They also bungled the Internet - the biggest bungle of all: rather than using IE's 95% market share to own the net, they let the upstart Google slip in and are now a distant third with a second-rate search engine that no-one uses.
So while it's true that VMWare must inevitably face competition at some point, I'm not so sure that Microsoft will ever be the main focus of those worries. They really seem to have lost their touch.