Glasper's a fine Jazz musician on the evidence of the few times I've seen him live.
His music has always been informed by contemporary R&B and Hip Hop since his earlier albums and he has moved more into those areas on recent releases.
He's widely acknowledged, not sure he's often called a genius, by a younger audience for creating music and facilitating others to do so in a contemporary take on an R&B/Hip Hop/Jazz crossover.
I"d be surprised if his music is widely appreciated on this board, a place that doesn't really embrace, with a few exceptions, contemporary music where Jazz is influenced by Hip Hop and contemporary R&B.
So, not a genius but an important musician in my view.