Let the hive mind of Engadget get that for you.
"I need help! I want a small pocket camcorder but I'm not sure which one to get. I don't want to fall into the hype of the Flip because I worry two hours won't be enough. What should I be looking for when considering a small camcorder and where can I get a good quality one with expandable memory? Thanks!"
technically, the reply to this comment is absurd. We would be talking about a format that would make even your theorhetical 75GB discs the relative size necessary for a TV show in highest quality. Understandably that would be higher than 1080p at whatever framerate you are currently running. As a side note, the optical capacity of HD hit 100GB in lab tests on four layer discs from disc production companies, so just like the three layer BD-RE's we havent been seeing, HD's can be even larger but really it doesnt matter. I have a hunch we will be leaving the optical disc market for containing media before we need that much storage. Just like we are seeing with some software on video game systems emerging, discs might become keys with small amounts of personalized or special content while the remainder of the information will be downloaded or transfered via a secondary proxy.