I'd call it "Fusion/Hip-Hop"
jazzy, blue-sy, yet still hip hop in nature...
People might wash away DangerMouse because he made that Gray Album... but with stuff like DangerDoom, Gnarls Barkley, and Gorillaz notched in his belt and with all of those becoming huge classix... He is trumping the bullshit that has plagued hip-hop (since about 1997) with straight down back to roots tactics.