The CF-to-SATA/HDMI concept is a HUGELY marketable product idea. We dont need to tell them what it's for(a hack), we just need to tell them what our requirements are, and who our reachable demographic is. The market demographic includes any current DSLR with an HDMI output, and any future DSLR/Camera.
We're at the event horizon of the 4k revolution, and we're going to need faster field recorders. There are already cell phones on the international market that record 2.5k video. To keep up with the competition, camera manufacturers are going to be forced to invest in a higher output for the low-cost market. I would bet my bottom dollar that pro/am HDLSR's(t2i's-7D's) will be hitting 2.5k by the end of 2014, and introducing 4k on higher end models(6D's-CXXX's).
With this, we will see a number of recording media options: Larger affordable CF/SD's, Thunderbolt/USB3.0 tethering, or CF-Tethered recording devices.