4K over 1.4 is 24fps, to get the 48 and 60fps you need HDMI 2.0.
Just reading between the lines, and knowing these guys did get to see cool stuff from Directv that hasnt been talked about, and knowing they have UHD plans, Im guessing they are looking at file downloads like 1080p movies now for UHD.
Very cool, then the next "Genie" probably comes with HDMI 2.0 and HEVC 265 support...