You get a really nice trends search feature, the image search that was so good Google stole it, a dedicated search for movie clips and trailers, MSN weather and Bing Maps.
I know I know, “but you can do most of that in Safari,” First of all if you’re a technologist using Safari should be considered sacrilege because it sucks so horribly. Secondly Microsoft incorporated some really nice touch gestures (swipe forward/back for pages).
All in all it is a great app. Definitely worth the download.