Awesome! Bob's real voice! Me likey.
I think you have a point, but comics also tend to have more issues and go on for longer than the other media you mentioned. Okay, Dr Who has tons of seasons but you could technically consider each new Doctor some kind of reboot.
I think what would be good for comics is to actually end them at some point and start a new one. But I'm all for the commercial idea too.
On that note, here [http://www.youtube.com/watch?v=idCfan_nMhM] is a commercial for a French-language graphic novel. The text is in French but you can always look at the pictures, I guess.
I also see posters advertising BDs (that's how we call graphic novels here) all the freaking time. I've picked up lots of series due to simply seeing the poster in the subway or in the street. It works.
I do think we relate to sequential art differently though. Series get one release per year (50 or so pages) and it's pretty much always hardcover, for instance.