yeah, it's called the e-amusement system and it's been out since early last year. So far Pop'n 9, IIDx 9th, GF 9, DM 8, GF 10, DM 9 and Pop'n 10 all are compatible with this. There's even as side machine called "ee'mall" which you can use with your cards to unlock songs and courses for all the games, and character items for Pop'n Music.
_________________
[BMS RED (sevenpointzero)] Progress - 85%