The trains do look very impressive and realistic so we can safely say that Thorpe Park have achieved their goal of thematic immersion here, even without knowledge of the ride experience itself. It is strange that the train carriage looks different to the one shown in the concept imagery( featuring Victorian influences)however, this ride has been shrouded in secrecy; so there's a possibility that the concept imagery was misleading us or that there are several train carriage elements and the Victorian train is already situated in the building. If not the train still looks brilliant so I'm not complaining.From what we know so far, I am in no doubt that this ride will be fantastic but I am also really enjoying the guessing game and exploring the secrets of this ride, on top of actually looking forward to the rides opening. The marketing and hype around this ride has been well designed and managed in my opinion.
These must be the functional trains (There appears to be 2 there, one exposed, and one inside), as in the preliminary results there was already a hanging train inside the building with the bridges and looks exactly like the concept imagery. I assure these are the trains that'll move in and out of the immersive tunnel, which I believe will contain a live action sequence. Also they did state in the Preliminary results that when you enter the hanging train, it changes into a London Underground style train.
Also I wonder why they've revealed them. Maybe they're going into the building soon. Or maybe it's just to tease us.
Anyway they look really cool and I can't wait to ride it. Also as you said, it's cool watching it unveil and trying to get how it will work.