I'm not really sure what your trying to say but the stream is decompressed at the cable box or at the the over the air HD receiver. HDMI 1.3 and 1.4 support up

I'm not really sure what your trying to say but the stream is decompressed at the cable box or at the the over the air HD receiver. HDMI 1.3 and 1.4 support up to 10.2Gb/sec bandwidth. The video is not compressed, the audio may or may not be. So why would you think that there isn't 720p x 60fps being sent to the tv? The max video you can get through HDMI is 4096×2160p24 @ 24bit color completely uncompressed which is several times the bandwidth needed for 1280x720p60 @ 24bit color.