To see that we will need some healthy competition in the ad and search space. I actually hope Bing does well just for serving this purpose. Google's search page was nearly the same for 5 years, Bing comes out and adds a few more dynamic ways to search and Google had to re-vamp their entire home page over the course of 2 years. It is ironic to be in a situation where Microsoft's relentless and battle-hardened strategy of copy-cat is the most powerful thing keeping Google from doing evil.