I was correct about it being PS4/Vita. Weird there's no switch tho.
I don't really think it's weird - the source games are only on PS systems and this isn't like with Persona Q on the 3DS where it's based (gameplay-wise) on an IP at home on that system.
I would have liked Switch versions, for sure (because I doubt we'll get the Vita versions, and even if Atlus USA brings them over, Deep Silver likely won't for us European plebs and DLC+import is a pain on Vita), since I prefer portables to play my games on, but I would have been very surprised by a Switch announcement, not the other way around.
Regardless, I'm down for this. Persona 4 remains my favourite in terms of characters and atmosphere, so I doubt I'll like these as much as P4D, but all Persona games have some excellent music pieces in them and I love rhythm games, so I don't think I can really go wrong with these. I just hope we get the portable versions here.