The point of using an IR blaster has nothing to do with "laziness". It's to have the HTPC change the channels on the set top box for scheduled recordings, and for Tivo-like function while watching TV on an HTPC. A set top box won't magically change channels by itself, so the PC needs a connection to it that will.

The idea of a direct connection to the PC means the PC can receive the signal and change channels without a clunky IR interface to control a set top box.

Hmm "running IR blasters from the PC to the set top cable box" that sound like your just to lazy, But then againe cable box do have one major problem when the power gose out or if the box lockup and auto reboots it self it dosen't turn it self backon unlike satellite Box.
Satellite will most likely not be able to handel video on demand.
Satellite customers are not out of luck it just not in USA as DirecTV or Dish Network but other part of world all ready have it which has been a round for over 3+ years in but it only thoses European Channel
and USA can get thoses channel with rigth hardware and if you live on far east coast in USA/Canda in order to pick up thoses european satellite.