I just think this would be so hard to police that they'll just ban them. I live in a mostly rural area about 30 miles from the center of a major city. I see an ultralight about once every few months. I see small 2-4 seat planes from the local private airport every day. But all of those take more space to take-off and land then a yard or normal driveway.

One of these could take off from a patio, fly you down the road one normally commutes and right to the roof or sidewalk at work. Heck, if they sold this for thirty grand, I could see a flood of people using one instead of their car. Imagine the mess...