First, let me mention that this game is a masterpiece. I am amazed.
I am slowly quitting Windows, Antichamber and some other games are the only reasons I come back to Windows from time to time. At some point, I won't have Windows installed anymore and this will mean that I will have to forget Antichamber forever, this is very sad. A Linux port, even if it's in one year, would keep the game alive forever for us Linux users.
I wouldn't worry about sales, this game will probably sell for years, I've never seen something like it.
Edit: I don't have windows anymore, I might not play antichamber again :(
Edit2: It looks like its happening! Not yet on steam but you can get it from the humble bundle!