Confirmation of the release date for Ultra Street Fighter IV on PS4 has been announced, with the remastered title releasing on May 26th in both America and Europe. However, at the same time it appears that this will be a digital only release with the price set a $24.99. The developers have also confirmed that they have worked to remove any input lag from the game, something which was noticeable on the last gen release.
The PS4 edition of Ultra Street Fighter IV will include all of the content released for the game so far, including costumes and levels. Whether there will be more content release after launch is unknown, though it is likely all major work has shifted towards Street Fighter V.
Source: PS Blog