Rockets with cameras, simple as that. Estes made this market, and I believe one of the offerings remains the biggest selling model of all time. And yet they haven't sold a camera rocket in many years now, despite the fact that the electronics are constantly getting better, smaller, lighter, cheaper.
To paraphrase a post up top, people are taping key fob cams to their Big Berthas, for crying out loud.
Could be higher quality still photos, a variable shot angle, digital video to flash memory, real time to ground monitor (as with the new Estes quad copter), or some combination.
Best would be a truly well thought out modular system, with photographic nosecones or payload assemblies that can be moved from one dedicated launch vehicle to another - single stage, multi-stage, PSII, boost glider (I'm serious) that are all marketed in an aerial photography series.
The really dedicated home rocket builder can cobble something like this together, sure. But an off the shelf Estes-branded dedicated rocket/camera system is something that will appeal to a much larger audience and should always be in the catalog, in one form or another, evolving along with available technology.