Honestly, I think Ubisoft just want nothing more to do with the PC market but lack the cojones to own up to it.
Officially? Despite our "*****ing," it's not really worth making a PC port because all the noise we're making is just noise, and we would apparently just pirate it anyway.

http://www.incgamers.com/News/...-is-not-likely-on-pc

http://kotaku.com/5862433/i-am...-version-of-the-game