So I was poking around the Famitsu site a little more to see if there was anything more on SFIV and I had overlooked this article where the editors of that magazine had a chance to play the arcade version. So in addition to absolutely confirming the existence of an arcade version beyond all reasonable doubt, it also gives us a clue as to which hardware the game is running on. The game is housed in a Taito Viewlix cabinet, the same used for games like Battle Fantasia and includes an HD monitor and of course Taito Type X2 hardware. The article doesn’t say exactly which iteration of the hardware is being used but thanks to a comment from RyanDG it appears that a different article stated that it will use the Taito Type X2 (which I overlooked). The only problem now is that I don’t know of the Viewlix cabinet being heavily used overseas – let’s hope that they buck the trend on this one although I do hate how that cabinet lacks any type of cool artwork.