Those aren't ringworlds, they're O'neill cylinders, the like of which can be see in the webseries "L5", and the Gundam shows.
The few photos we have seen led me to believe this movie was going to be cheap looking but it's nothing of the kind!! Awesome trailer, and now we have 5-6 really good, genuine scifi movies I'm looking forward to this year.
No, it actually is a Ringworld type structure;
It's definitely a ring shape and the inhabitants clearly live on the outer ring.