There be Monsters....video screen over subway entrance

I wonder if this will become a commonplace, or just reserved for a few select very high volume subway entrances..

Big video screen was advertising what seemed to be a new monster movie among other things.

They have these mechanized street posters in some places now ( or did, I will have to check again) which would show one ad and then slide up and show another...

Well, as the advertising capital of the world, I am surprised they haven't done this before now.'
They have probably been doing it in Tokyo for years...