They are trying to monoplize the internet websites. Sooner or later they will block any user who isn't using IE or at least take them to a download site, also it's another way to make sure that IE ships with everything that requires downloads from there site. This includes services packs, games, anything they make that could access the internet. With so many flaws for Microsoft to monitor your activity using IE it's just amazing.
This is brilliant the way they think is so unreal that most people would not believe it. What they are doing is unreal and not justifyied by anymeans.