We recently did an Xbox Wire Blog Post about Q.U.B.E. 2 and it's performance on Xbox One X.
"We’re supporting Xbox One X Enhanced with 4K Ultra HD. Q.U.B.E. 2 also natively switches to 4K resolution when a 4K television is detected when playing on the Xbox One X, which enables super sharp edging and a crystal-clear focus of the game world."
You can read the full article here.