You've got the idea.
Sketch it out and see if you can get a bike maker build you one. You could probably patent it and maybe even make money on it.
Personally, I like the fact that the frame supports your weight on this design rather than a tiny seat supporting you on a thin metal tube. The harness is little different from a parachute or hang-glider harness where some flyers soar for hours without effort. To me, this is a great idea, albeit a little clumsy mounting and dismounting.