"Why will a lot of aircraft be declaring fuel emergency? The vast majority of IFR activity is already at those aerodromes and has IRS/INS."
Guess you've never been into Eastern USA when a winter blizzard blows up and there's more heavy metal stacked up than a Mc Airports car park.
If GPS went down in Australia there would be a lot of heavy metal queuing for available ILS's and with our priority system GA would be a long way down the queue with nowhere else to go.
Akro, I agree with your sentiments. Perhaps an NDB or VOR endorsement or whatever the hell their called these days will be something you gain in a simulator, just for the sake of getting a tick in the box. A required redundant waste of money because there will be no ground aids left to do one for real. I hear ASA will soon promolgate the 4D star wars approach. To gain approval will require the force to be with you, tolerances are +/- two dimensions.