Unless this is marketing understanding fuck up and they were just trying to describe it as a non-final build, I actually suspect 'windows version' is what it sounds like. I wouldn't bet on a steam/arcade release, but they do love their hints - full of tease:GSK wrote:When they say "windows version" they mean it's running on PC dev hardware as opposed to PS4 or conventional arcade hardware, they aren't necessarily hinting at anything. (They did explicitly say they're undecided on an arcade release, however.)
https://twitter.com/M2_STG
... Otherwise, even if non final, this would be executed on a ps4 dev kit, which is not a windows environment, and they'd just call it the ps4 version.
That this gen of consoles are so much closer to a mainstream pcs than ever before means it'll likely be entirely on the terms of their licensing, and then whether they want to bug fix it for all the various hardware/software/driver/support issues that'll come with a full pc/steam release... or jump through the various licensing hoops for a single 'arcade' pc hardware configuration... neither they've tended to get involved with in the past - but you never know - and if it'll get some attention they'll sure as shit hint/tease either
