Cablelabs can go sit and spin. I can build a better/more quiet/cheaper HTPC than any of these "certified" vendors that Cablelabs forces you to use if you want a cablecard HTPC.
Anything that I want to record is OTA (over the air) anyway, and if there is something on a premium channel. Well the Comcast DVR grabs that.
Good luck with that "bottom line" Cablelabs.