I've got the free version on my 2008 Mac Pro. Just verified that it works with Sierra. I doubt that they'll make it for console, but you could probably run Sierra on a PC using Virtualbox.
https://www.wikigain.com/install-macos-sierra-10-12-virtualbox/
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They certainly have at least made some effort to port it on Xbox because Marathon 2 is on Xbox 360. I doubt anything mentioned here would happen immediately, but if this new Marathon game takes off, the originals are definitely going to be a point of interest. To be blunt tho I also don't have a proper PC and I don't really want to invest in one either for gaming because even the cheap ones aren't all that cheap