A linux port would be pure awesome. Steam is already launching on linux and with windows 8 coming, maybe it is the right time for it since people that are disgusted by it would happilly go and install linux if they know that there are games there. FF's game engine is already ported on ps3 so it shouln't be that much of a hassle to port it on linux or make a windows opengl version of the client which would run very well on wine. I'm an Archlinux user and i'd really like being able to just throw windows out of my computer, it would be really good if square enix could follow vavle on their way to enlightment(and participate in the destruction of the worst software company ever!).

best regards,
Me!

PS: there is an enormous difference between linux and macOS : linux can be (easily) installed on most pc(and with just a few tricks on the rest).