Yes, but the issue here is that people will use the browser they want. They don't know or care about web standards. They will keep using their favorite browser, while using firefox/another browser for those sites that don't support IE. Less intelligent people will just think the site is broken. Unfortunately, most developers would probably be fired if they refused to support IE. I'd like to think that the open market will work things out but I don't see it happening anytime soon.