There's a lot of random crap in Google image search, and im constantly having to open new tabs to look at them, with bing not only can i have all the images in a single list that loads as you scroll rather than opening the next page, I can open the image and keep the list to the left hand side. I can also click "see similar results" when I find an image which suits my subject well, and it'll give a list of pretty accurate alternatives.
I use google image search everyday, when I'm working on something I usually google a lot of images and save any of the ones I rather like, I have over 5 gigs of reference images on my pc, admittedly 2.3 of it is from a torrent, but the rest is my own collection from google image search. This is just a huge time saving device for me.