Because I’m probably not a genius, and I’m definitely not a moron.
Bing’s visual search is doesn’t do anything useful. It doesn’t make your searches any easier, and it certainly doesn’t make it faster. It adds a layer of visual appeal, but even that appeal isn’t so appealing. For example, try searching for Obama in the list of US politicians, which they suggest as a good search. Here’s what I see:
(Click for a larger image)
Compare that to the normal Bing search results: