Obviously the economics - and I have no real knowledge - will ultimately dictate whether things are made into movies or serialized TeeVee shows, but I do look forward to the day when the obvious visual translation of a good novel isn't the big screen. Or, hell, bring back serials on the big screen!
Though, ultimately, nothing is medium specific anymore. Someone should try a big serial. My guess is that if Harry Potter came out today (with associated popularity) it might be a good test case.