I get that, but the trouble is that it sounds very much like the stance Microsoft has taken, which is that since they have 90% (or whatever) share of the market, they are the de facto standard so others should get in line with what they do.
And the counter argument had been, no, browsers need to follow formally recognized standard, specifically what the W3C endorses. What's funny is ti see that toss aside now that it has become practical to ignore the W3C.
I expect HTML5 to become a W3C rec at some point, and Microsoft to follow along, but it still seems hollow for people to complain that Microsoft is not be so anxious to jump on an HTML5 implementation.