NextGen, FANS and Capstone are stupid names/acronyms. I mean, seriously, it was nextgen what, 10-15 years ago, what is it now? Now we got flippin touchscreens that blue-tooth to our iPads. And capstone? So nothing better can ever come? Future nav system? Well, if you are using and making it now, it's not "future", in addition to the next ANYTHING that is developed renders it "Old Air Navigation System".