For my money (of which there is precious little), the influx of electronic avionics displays and processors will re-introduce a time when most of the value of an airplane could be added up in the panel. It was that way back in the 70s and 80s, when the cost of a fresh suite of flip-flop radios and perhaps one of those RNAV units - even a loran! - would easily outstrip the book value of the rest of the airplane. People did it back then; and they should do it now. Except now, we can add so much more capability - with synthetic vision, moving maps, terrain warning, traffic, weather, engine monitoring, and about 829 other things I can't think of right now. Even an airframe eligible for AARP membership is still a mystical magic carpet that, unlike a flush stock portfolio, allows us - to FLY. So let's make the most of them all, and give them the best we can bring ourselves to afford; not because we think we'll get it back someday.