Internally Codenamed 'Kumo' , Bing is launched as a decision engine that goes beyond what people have come to think of as search

Personally I believe thats right. Search Engine is outdated concept, we need decision engines and Knowledge engines in todays world..Internet is plethora of information. not only search logic but different algorithms should be applied to take us as nearer as possible to 'answers' what we are looking for, without getting lost in the Web.