While I enjoy all the bells and whistles of Legacy steam locomotives, I feel the next generation of features should be centered on realistic operation. Maybe that's what Lionel has planned with the force-measuring coupler feature with the new Vision Line steamer. Assuming it is as neat as it sounds unless it filters down to Legacy engines it'll be an isolated feature for one model.
It'd also be neat to eventually see the next generation of locomotive control by voice command, where an operator talks into a command control headset, and tells an engine, "Erie 3321", proceed on track 1 at 25 mph". "Erie 3321 engage rear coupler", and so forth. It's a logical step forward in command control technology.
Another feature I always wanted was a mini screen on the remote control that gives a cab view of addressed engine. Then I can really "drive" my locomotives around the layout no matter where I am standing.
I doubt we'll see any of these however as it seems the importers struggle with basic QC and operating features working as they're supposed to.
