"The days of a lot of new announcements at the N scale convention and NTS are over, probably forever."
Likely true. Before instant communications announcements almost had to be made where there were reporters to publicize them. Today, anyone can announce anything online, and anyone interested can read it, at any time. The conventions will probably continue to evolve into social show-and-tell events only, with any manufacturers present just to "meet the customers", and maybe to show new items to those who want to see "reality" rather than pixels.