Companies like CHC Australia will want to hope that the 4MB edge card eventuates soon as I believe they use the TNL2101 as their fleet GPS model....that means a hell of alot of TNL2101's that could become obsolete in a short time. Imagine the cost of replacing some 40 odd units plus the ones in store plus engineering work to fit.
Personally I like the Trimble (freeflight) unit if fitted with some sort of moving map display in the dash but do admit it has fallen way behind technologically.
Ah the GPS monopoly is very alive now with only King (Honeywell) and Garmin the players left.