Image search on Live is pretty cool. The AJAX functionality gives you the opportunity to scroll through massive amounts of images without clicking to the next page.
These refinements gives you the opportunity to find what you are looking for faster. Imagine you are only looking at black & white pictures of cars, this can be done pretty fast like this.
But what if you are looking for the keyword Apples like I was doing, and you had never seen this functionality before. I seriously was thinking that I could choose between green or red apples. I thought: "Live has cracked the image search like nobody can ever crack it..."