Sword Art Online is linking up to another world with the incoming release of Accel World vs. Sword Art Online. Developed by the same team behind SAO: Lost Song on the PS4 & PS Vita, they are taking mechancis from that title and using them in interesting ways.
The above gameplay video indicates that the gameplay systems from Lost Song are largely intact but a bit of a drop in frame rate and visual fidelity is noticeable. My guess is that similar to Hollow Realization, the main version for the title is the PS4 release and they had to downgrade a lot to get it running on Vita. At the very least though, it is more stable compared to early Vita footage of Hollow Realization.