I'm just talking about the decision process, not the facts. After all, Starforce was able to scare/bully smaller developers into using their horrible DRM with horror stories of piracy and mirages of extra sales through this kind of reasoning. Regardless of whether piracy is really the big deal the overblown scare stories like to portray it as, the attention it's given is going to colour the actions of decision-makers. And if it's as easy as 'make it for console instead', especially when console development is cheaper, requires less technical support and for many genres has a solid playerbase...
Ironically, with regard to media centres, modern TVs already contain embedded systems to play a wide range of media. I can plug a drive into my television and play all the media I have (h.264, xvid, etc) without needing a computer or a 360 or whatever (which is good because the 360/Windows media streaming is a complete disaster of departmental infighting and competing systems).