Bing is not simple at all. It is very complex. Even more so than Google. Google gives you results based on the number of times people have searched a subject and even then those results are based off of how many times people have click certain links.
So the results can be far and wide if you will actually get what you want. Bing is the exact opposite. It gives you exactly what you are looking for within the first few results. Not to mention that if you searching for a Video, you get a preview of it. Without having to go to the site.
Images? Bing gives you all the results on a single page that you scroll through. Not just thumbnails that you have to go to the site to get the image from.
Bing is much more than what Google is and i wouldnt be surprised to see Google adopt a few things from it.
Microsoft replaced Live Search with Bing. MSN is and will always be there. Even the MSN homepage uses Bing as its search now.