Just tested this. Using an iPad mini casting to Vizio M65 (F series) with the built in CC. Was able to get 1080p but still stereo sound.
Tested with Blade Runner 2049, IT, and True Detective S1E1.
So now Crave is only stuck 5 years behind everybody else.
Samsung 61A750 - McCormack LD-2/DNA-250 - Dynaudio Contour S1.4 - SVS PB12-Plus - Oppo BDP-83 - PS3/Xbox360