One area which doesn't seem to be getting a lot of attention is ELT's. The satellite is not listening to the 121.5 signal anymore and the replacement 406 ELT's are 5 times the price and don't work any better then the old 121.5 ELT's. Not to mention they are yesterdays technology.
Except for the New Zealand "Spider Tracks" system, nobody seems to getting really serious about a real time automatic GPS tracking solution that would have auto alerting and track history at a price point that would work for all of GA (ie less than 500 dollars).