Startup Idea : Faster shopping on Internet

I would like to create a web application that would speed up shopping on the internet e.g. on ebay.com. In the application you uploaded an image of what you want and after that chosen according to similarity search. Applications should show a percentage according to the similarity. Then you could choose from categories such as cheapest seler or authorized seler. Applications should be based on the principle of comparing persons in the police but for commercial use. Furthermore, it could also compare the video when I see something in a movie and I want it now it can search and buy it. What do you want to get now.