Whoooohoooo~!
Project Diva X for Vita and PS4. Vita will get this version first by March 2016.
And Project Diva Future Tone for the PS4! (This is a port of the arcade version which boasts a huge song library).
Both announcements are for the Japanese version but knowing that Sega localizes their Diva games (since it appeared on vita and ps3), it will only be a matter of time before they get the Englsih versions.