Well, I guess it's easier for a competitor to jump in on someone else's idea and not have to solve the same issues as the original patent holder - or plough in the same R&D funds and carve out a market. Or not be constrained by or held accountable to the same standards. But yeah sure, they add a few bells and whistles and reduce the price. Built in speakers? Really?
Perhaps Segway should release a 1 wheel Segway PT "AW model"?