I'm excited about the style of the new old-time passenger cars. The cars with the "duck-tail" roofs that have been available for decades are nice, and they're good for the late 1860s and 1870s, and no doubt many remained in service for years after (witness the Virginia & Truckee passenger equipment that survived to make it to Hollywood), but the new cars will be better for later in the 19th century and into the early 20th century. I'm assuming they will be the same length as the older cars, which will make them good for small layouts. I'm also excited that there will be a full baggage car, as well as a coach and combine.