Things that need modeling.... Are we hitting the point of diminishing returns with freight cars, locos and structures? A question that's need answering! The answer depends upon the direction a modeler takes in their pursuit of the hobby. If you are a "Detail Modeler" of the roads offered by the manufacturer, things couldn't be better for freight cars & diesels. If you are a "Detail Modeler" of roads not offered by the manufacturer, things haven't changed! In fact it will remain a challenge to go from an "Undec" to a super-detailed model.Structures usually don't resemble anything a "Detail Modeler" would use on their layout. To model the structures of an area, reigon, etc, one must scratchbuild or do some serious kitbashing.
There are many who choose to model roads which are offered in a ready-to-run, factory painted, detailed model. For these there remains the satisfaction of *watching the trains run* model railroading.
There are others who choose to model freight cars and/or diesels which may never be offered by the manufacturers. Kitbashing/scratchbuilding will remain the methodology for these "Detail Modeler"There is much left for the "Detail Modeler".
Model track is certainly one that needs improving. Commercial track bears little resemblance to the real thing.
Lighting has hardly been touched. Class lights, lighted numberboards, cab lighting etc.
Flag holders for extra trains, seldom modeled.
Scenery, Here is an area which has hardly changed. Many roads use a particular type stone for ballast. Woodlands and underbrush varies with geographical areas. Roadways, sidewalks, paths are areas needing a "True-toLife Modeler" to dress up. Water?, well there are a few ways that have been tried, but no one has come up with running water.
Sound, here is an area coming on the scene which can lend some Ambiance to a model railroad.
Smells, here is another area that could lend an "air" the the model railroad.
Operations, many ways to acheive this but you must have a railroad first! I think there is much to challenge the "Detail Modeler". Even the future of magazines may be tied up with this little box we call a computer. Pay a fee and you can access this months issue, or search thru the past several years, now there is a thought. No more piles of magazines. Another option would be a CD with all or several years of a given magazine, just pop in the CD player and look up that article.... All our buying will be done on the net, no more mom and pop stores. There will be some who will buy the MS stimulator and play trains in virtual reality. Now those last couple sorta depress me, so I'll stop now.....