Also, those "incremental" improvements often lead the way for more advanced applications of the device. To carry your example, at some point GPS is not feasible

Also, those "incremental" improvements often lead the way for more advanced applications of the device. To carry your example, at some point GPS is not feasible because, off the top of my head: * Screens are not good enough. * Processors are not fast enough. * Radios are not sensitive enough. * Data storage isn't small enough. * Batteries aren't dense enough. It took these things all converging with "incremental" improvements to allow the major advancement of consumer GPS.