Xbox One on PC - an idea.

MS are currently porting some of their own exclusive games to PC to try and get a wider audience. That got me thinking, what's to stop them releasing the Xbox One chipset on a PC card as well as offering the existing console? They would be saving money on a HDD, BR drive, network chips, the casing, power supply etc. They could put the custom GPU/CPU, sound chips, 8GB of RAM plus ESRAM on the card and then use the PC's existing CPU to tie it all together. Ship with a custom secondary OS integrating with Windows 8 and a Xbox One controller and they get to shift, in essence, an Xbox One for considerably less money, potentially increasing the userbase. Sell it at £200 - £250 and keep the Xbox exclusives exclusive to Xbox. Would it be technically possible? If so, would anyone buy one?