I was actually thinking a little something sorta' like that, too.
Only I thought...
A cross between a bus and a waiting room.
It just doesn't have so strong an impression of being a transportation facility.
I think it might be that it's so spacious. (Which might be part of the church impression, too.)
Passenger trains tend to be condensed to the point of looking rather uncomfortable.
With narrow walkways and... maybe smaller benches spaced in rows that are rather close together so that there is little leg room.
And maybe it's just the train, but the ceiling looks unusually tall, with the windows situated rather high up (church impression?). I guess that the windows would seem to usually be about seating height, for the sake of the passengers... that way they have something better to look at than everyone else and the walls... even if they can't see anything out the windows. They just have to have something to look at so that they don't feel dumb while they look at nothing. XD
I think the thing with the ceiling's height is that it contrasts with the width of the floor.
Lastly...
It might be specific to this train, but I guess I might expect more things indicating such forms of travel... like stability... perhaps in the form of handles/bars or poles or something... and luggage compartments.
...
I've never actually been on a passenger train.
But... I've seen them in movies... (I... actually really hate that line).
They manage to make them have a convincing impression that's train-like to the general public, anyway, and that's what I've derived from them.
Edit:
And just so that I wouldn't totally obliterate my integrity by believing what I saw in movies, I looked up pictures of passenger trains on Google... for assurance. XD
I suppose I might have been implying an image more like this, but... considering the train, not so plush or modern and of a different design/shape... ya' know... like a creepy Pending Else train with glowing red eyes in dark places...:
http://static.howstuffworks.com/gif/diesel-locomotive-passenger.jpgEr...
Sorry, was that my rambling at you?
Or giving advice?
It really isn't all that distinguished to me at this hour. XD