http://www.youtube.com/watch?v=p4jpYj4g9_s Friendly reminder that what is essentially Project Diva Arcade is now out on PSN stateside and Europe (Sadly no physical release, even in Japan.) I'd highly recommend grabbing this one in all of its 200+ song glory, since you aren't going to get a more complete Project Diva/Miku game any time soon.
Yup, even at full price this thing is a steal. It contains almost every single song from the previous Hatsune Miku games outside of Project Diva X.
I never did release my stage DLC hack for Project Diva Extend for PSP which would have included all missing stages from PD1/PD2. Then again, the PSP is more dead now than the Vita. Also I called Project Diva on Holo Lens as soon as it was announced like over a year ago. Glad to see it's in the works.