PNP, is good for those people who just lack the time to put an ARF or kit together. It's really not that new of a concept. It's just now reaching people with pockets that arn't very deep. People have been paying builders to put thier stuff together for a very long time.
PNP will introduce or re-introduce people to the hobby and get them flying. After they go to a field a few times they will see all the other planes, engines and equipment being used and they will find the time to build too