That is if you like HO and N scale. Not too much in way of O Gauge. Alot of commercial vendors though. Talked to Atlas, and they are finishing design of new backward compatible signal boards and signals, removing worry over system obsolescence, now that Custom Signals has ceased operation.
Alot of great HO, N and Z modular layouts. It was apparent, the smaller you go the more everything has to be perfect. Little bumps in our trackwork would be almost derailments in N but definitely Z. Some of those layouts "are to die for" as far of track work design (large yards, intricate interlockings etc) but if scaled up to O scale would require the proverbial hangar to enclose it. Some were even complete with prototypical bi-directional signaling. The scenery details on some modules were almost "photo-realistic" when viewed at track level.
Something new to me was Lego train sets. Not the blocky chunky ones but what were realistic steamers and diesels. Not sure the scale, looked like O or somewhat larger scale, running on plastic rails, so obviously battery powered (radio controlled??)
