Essentially bing replaced msn search. If it is really better than the competition it will be a game of attrition to get people to try it and switch permanently.<p>It is very very hard even for a company with the marketing power of microsoft to unseat an established competitor that offers something that most people are happy with.<p>Sure google could be improved, but to switch you have to have something more than just a little bit better, you have to do to google what google did to altavista.