I’m not sure in general, but I had a similar thought ~5 years ago when the new London Underground tube stock design was unveiled in the form of concept art. A few months ago they did their first press session with the actual trains, and to a layman’s eye, it’s basically exactly what was in the concept art. I’m sure there are differences for commercialisation and operational details, but I can’t notice them.
Concept cars are about the concept and not intended to become a real car for general availability. Whereas projects like this are typically fairly directly tied to an actual project to replace the rolling stock or a contract with a manufacturer. They may still be a little aspirational and need the details working out, but I think they tend to be much closer to reality.
The overall thing? Not sure. But the seats are definitely real and aren’t just 3d-rendered, as one of the images in the article is an actual photo of those chairs in one of their facilities (i.e., outside of a train).
