Here's a video my wife took of the layout before I sold it. And I don't think the hobby is dead. As a matter of fact they came out with some new technology that I wish I could have afforded to put into my setup. Wireless, remote control units inside the locomotives. They don't require any electricity going to the rails. You place a computer type board inside the loco.
And FishTaco, my wife was trying to talk me into garden railroading to get me out of the house. Instead, I got back into radio control airplanes.

"From our orbital vantage point, we observe an earth without borders, full of peace, beauty and magnificence, and we pray that humanity as a whole can imagine a borderless world as we see it, and strive to live as one in peace."
Astronaut William C. McCool RIP, January 29, 2003 - Space Shuttle Columbia