Movies in some way, 3d mandatory format for 1080p S3D is 1920x2205 in "frame packing".
Movies also have to be decoded, it requires a lot of processing power to display this in more than twice the horizontal resolution. Other old BR players won't be able to do this. PS3 already were able to decode br movies at twice the speed (48fps) that's why she can handle mandatory 3d format (and with some tricking on the hdmi 1.3 output format to meet 1.4 standards)







