The SCEJA conference for Tokyo Game Show 2015 has come and gone, and there wasn’t mention of the new Project DIVA title Project DIVA X at that time. However, Project DIVA Future Tone for Playstation 4 was announced after Nagoshi had concluded his presentation.
This is a port of Hatsune Miku: Project DIVA Arcade Future Tone originally for arcades. Project DIVA Arcade has actually received many revisions in its time. With Yakuza 6 being released exclusively for Playstation 4, and with other titles like Phantasy Star Online 2 (honored with a brief promotional video throughout the SCEJA 2015 conference) coming to Playstation 4, it appears that Sega is warming up to Playstation 4 exclusivity.
The game will be a digital release, and the release window right now is only specified as sometime in 2016. The announcement trailer can be seen below!