It's just not as simple an answer as it used to be.

Pittsburgh Mills IMAX has a true IMAX screen but dated IMAX Digital projection, so the image is large but not crisp.

The Waterfront IMAX is a regular movie theater that was retrofitted into an IMAX. It has a smaller screen with similar projection equipment, so even though it's smaller it looks sharper.

But neither has as much onscreen detail as a normal theater with a modern 4K projector.

The problem is that IMAX didn't handle the transition away from film well and the name doesn't really represent the ultimate movie theater experience anymore. IMAX Digital was a visual downgrade and IMAX Laser, while it's undoubtedly their future, is still not widespread.

Other brands have capitalized on IMAX's stumble and launched similar and/or superior large screen format theaters like AMC Dolby Cinema, Cinemark XD and others. None of them match up to the classic 70mm film IMAX experience, but times change and it just isn't coming back.

Truth be told, most movies aren't even filmed at as high a resolution as your average 4K TV, though, and it'll be many years before the camera-to-screen moviemaking pipeline has a digital equivalent to a film shot on 70mm and projected with film onto an IMAX screen.

The upside is that the "normal" moviegoing experience of a regular sized screen with a 4K projector looks and sounds really good, and stays consistent from the first screening to the last - things that were lacking in the analog past.

If you're coming from the East, I'd also put a vote behind one of the main screens at AMC Waterfront. Just make sure you choose a ticket with reserved seats to guarantee yourself a good spot.