Yes sure it's possible,why not Bing can posibility defeat google if they have more competitive features and service than google
Google was King...Google is King ..............and Google will remain King Forever up to when Internet is there......Nobody can beat Google....
I dont think this will happen ever.... Google has been the master in this business and is innovating itself everyday. I also feel that the factors like pagerank, backlinks and few other stuff introduced by google are the most important part of the company to attract the people around the globe.... Until and unless all these things are introduced by any other search engine and marketed properly, google is not going down.
Bing has a long way to go. Google will dominate the search engine market for next 100 years. They are continuously working upon new ideas to bring more visitors each day.
Google has achieved this position due to its tough strategy to perform best for everything,.and that's the reason why yahoo existed before than Google but now is behind Google in search engine names.. Google keeps updating its algorithm to always fetch the best results for the users search query.
Google is a large company and search engine is just one of their things. The thing that started it all off. Anyway they are a young company and they need to make a really big mistake for bing or yahoo to take over.