Capcom hasn't decided about Arcade version of SSFIV
Capcom has told Kotaku that if they were to port Super Street Fighter IV to Arcades, it would be an easy transition, like new artwork and new software.
For now though, they haven't decided if such a thing is to happen.
When it was announced a bit and a half back, it was confirmed as a disc release only for the PS3 and 360.
It's out next March.