Some are, some aren't and some are offered in both formats
For major movie releases, they tend to alternate between 3D and 2D showings. If you check the Smithsonian ticketing website, it indicates which is which
There are 2d and 3d showings. Reco calling because their site sometime do not provide the details when buying tix online.
Majority of them are in 3D
No. All are not 3D. You have to check before buying ticket.
No there is a mix of 3D and standard film. It should show the difference when you go to buy the ticket.
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