I've been meaning to start this series at some point (my to-read list is ten miles long!), and while I don't have HBO, I'm looking forward to watching the adaptation at some point. Regarding the incomplete series issues, maybe having the books adapted for TV will be just the impetus to finish it that GRRM needs. If HBO sticks with it, and doesn't cancel the series before they get to the last book that is currently done, GRRM will start to feel the pressure at some point to get the next book out so that it can be filmed. Otherwise, he will leave the network and its subscribers hanging.