Apparently PC version is on the way. It was announced by Kojima Hideo on his HIDERADIO, you can find the taping of his seasons on his blog,
http://www.kjp.konami.jp/gs/hideoblog/
source: neogaf (posted by raven777)
Kind of an awkward way to release such news and honestly if you don't follow his blog and broadcasts you probably will miss out on this announcement. So I think is only fair to reference the original source.