I think at the end of the day the NPPL is a great thing.Getting more people in the skies can only be a good thing.
As Beagle mentioned,it CAN be upgraded to a PPL...I honestly think the pilots who get a NPPL will be safe and I will be more than happy to share the skies with them.
Think about it,for most,you`ve gone solo in under say 25 hours...you can take off,climb out to a desired altitude,do basic turns to a desired heading,and that controlled crash to earth called landing!!folks,thats all there is to the rocket science of flying!!!...I think the biggest problem (if there were one) would be navigating..I`m not sure of the x/c time required.