Using another browser besides IE is not going to hurt "Bill's pockets" one bit. The OS is still on 95% of the worlds PC's, and having another browser just gives M$ more time to fix the one he has, while you explore a open source browser. It is when people start to explore open source operating systems is when his pockets will get a little lighter.
You didn't get what I was going at. IE is on so many computers because it ships with the OS. If that will not happen anymore, people will be looking on their own at what browsers to use. And open source projects will have better support and a higher popularity.
But this is theoretical and off-topic.