For instance, I use VistaPrint for business cards and some other business printing needs. Many of their on-line editing features were limited to Internet Explorer, and moreover, to an IE version not availble for Mac, my platform of choice. So to edit my docs, I had to use IE on a PC somewhere. Now I can do most, if not all of my editing in the browser of my choice on either platform.

I think of it like the Sony Beta tragedy. Beta was a superior product, but VHS manufacturers established better early market positions. Sony finally succumbed and adopted VHS and Beta went the way of the dinosaur. So, as consumers, we can let Microsoft dominate the browser market, and forever be using a crappy product, or we can use the better product whenever we can and hope the financial sites and others will catch on.