For what, making their tablet interfaces similar to their desktop interfaces? I don't see this being anything similar to how they evicted other browsers, media players, zip software, cd burners, basic video editors, antivirus software and whatnot, sure they can make them similar but your desktop doesn't come with a "free" Windows tablet which you might as well use since you have it. You can't move a single Surface tablet without people going out and buying one. With that logic you'd quickly go overboard, then the Xbox had an antitrust advantage because they used DirectX's dominance in the PC market to gain a foothold in the console market. And Apple, boy did they use their iPods to sell their iPhones to sell their iPads, it's antitrust all around. No, this idea sucks but it's well within the borders of legal stupidity IMO.