I'm not sold that this approach - eliminating the need for coordinated flying- really removes the big barriers to flying. I'm surrounded by aviation lovers who don't fly PPL, and the big barriers are cost, time, and fear.
The Ercoupe tried this exact approach in the 30s in one of the big GA booms and it just wasn't borne out.
I'd love to see more GA pilots, but this won't get us there as quickly as say, comprehensive medical reform or a production aircraft that's cheaper than $50/hr to fly would.