The Radeon Pro 460, 455, and 450 will debut on the new MacBook Pro 15 with the high-end option carrying more shader cores than the desktop RX 460.
http://www.notebookcheck.net/AMD-announces-Radeon-Pro-graphics-for-Ultrabooks.182380.0.html
Any idea what is the graphics performance of the radeon 460 parallel to? I read somewhere it is equal to a gtx 965m... but i somewhat doubt it... (gaming wise)