"those two big engines ( Google and Bing ) couldn't probably adopt because they are simply too big." and "some good coder could simply copy it in like 2 weeks." seem very contradictory.
The idea is really simple but the results are nothing like normal search engine (it works differently than blekko, DDG, Google, Bing etc. ).
People are used to the way Google works. If they(Google) tried to adopt this new way, I am sure many people would resign / change their provider. But still for many people, it would be a better experience.
If its just about ux then you should consider that google will put that option as an extra style of search and starve off your users. Either way if it's innovative get it done, if you don't make money you've at least improved the tech that is available out there (from you or google).
