For the last time...
The reason that this is a problem is that Internet Explorer has a very poor record on standards compliance.
The dominance of Windows leads to a dominance of IE, precisely because of the "don't care" crowd.
The dominance of IE (not standards compliant) leads to coding of sites for IE, leading to lock-out of other browsers.
If IE was free for all platforms, this would not be a problem.
However, IE is not available for PS3, Wii, Symbian, Linux, etc etc etc, and this means that IE dominance perpetuates the tying of the internet to Windows PCs.
Mobile technology has made great leaps in recent years, and home TVs are now of a sufficient resolution to cope with a rich browsing experience. Ubiquitous internet is finally becoming a reality, but it is not to Microsoft's commercial benefit to allow this to happen -- WinCE failed to make a solid dent in the set-top-box market, and DTV and Blu-ray technology have introduced an MS-free software stack into the living room. Windows Mobile can ape much of the non-compliant functionality of full fat Windows, so why encourage people to use iPhones, Android phones and the like?
The ballot screen is a clumsy hack, but it is necessary to allow the internet to break free from the desktop and realise its full potential.