I didn't see Casablanca but I saw the first Boondock Saints when Fathom Events re-released it for its 10th anniversary back in 2010.
They're digital projections, which I understand is the wave of the future now, but it doesn't do it for me. If I'm going to see an older film in theaters (which I've done plenty of times), I want to see it the way it was originally shown in theaters.
Since Fathom Events are at theaters nationwide it feeds off of a satellite. I remember the DirectTV logo when the channel it was going to air on was started.
When I still lived in New York the theater that had Stooge Festivals every year transitioned from original 35mm prints to DVD projections. That killed it for me -- I stopped going. Their rationale was that was too tiresome to find original prints. I can understand, the average-going public doesn't care about that kind of stuff.
These Fathom Events tend to be more expensive than traditional film-going experiences, too. I paid $15.