Nobody has called it a RPG. From what I've read, it's going to be a FPS/RPG hybrid. Probably with a similar progression system to Deus Ex. Personally I think it would be a shame if RPG Watch stopped writing about hybrid games

EDIT: Regarding DE as an inspiration, they've mentioned the multiple solutions aspect as an inspiration. I'm just guessing the RPG system is going to be similar to DE, at least parts of it, as well.