Steering with the stylus seems awfully problematic to me. I personally don't like that idea. Seems to me it'd be awfully hard to hold the thing with one hand (and controll the throttle and brake with that hand) and steer with the other. I'd hope there'd be another control setup up or two.
However...the idea is unique...I can't find fault with somebody trying something new. If nobody tried anything new we'd still have horse and buggy carriages and flying would be for birds.