Huh. This is the first I have read on it, and I am excited about it too. From what I gather, the genre is purely music. Since I've never watched any anime with said genre, I can't even imagine how the narrative is going to work out, which is one of the elements that hold my interest.
Subjectively, I expect the illustrations will look better than what was displayed by The Idolmaster spin-off, since this is full-fledged (...This is not always the case). Not that those illustrations are not good, per se.
Anyways, I am definitely looking forward to watching the anime.