A lot of the games are based on screens and video images.  Are there any 3D games?
Either at the casinos or online?

Yes.  
These summed it up for me too.
"All of the 3D games that I've ever played aren't that great... It's going to be really cool though if eventually they'll have real 3D type online casino games out there where things actually come out at you like in Avatar that would be insane and something that I think that I'd definitely be playing all the time!

That would be very sweet actually and definitely the kinds of casino games that I myself personally would be very much interested in playing. I hope we do in fact see something like this come about with the release of this new technology which is inevitably coming relatively soon!

Playing 3D slots games would be very cool especially if they were designed and developed with the same tech that they used on Avatar. Same goes if they were to have real 3D blackjack, craps, roulette, etc... I don't think that we're that far off for doing this sort of thing from a technical stand point with televisions so it's not going to be long before this technology is ported over to our computer monitors as well. Should be exciting to say the least when it does happen though!"