Remember, it doesn't matter what artists want to make, it matters what consumers wish to consume. Money people, money.
I have no desire to return to the theater to watch a film - I've got a cozy den with a large screen, controlled atmosphere, access to any comfort foods I wish, I can pause to attend needs without concern - why the heck would I want to risk $20+ per person going to a theater and getting a lemon of a movie, or intereference from randoms???
And yes, IMAX and The Sphere are gimmicks like 3D/VR, they're not adding to the art of film, but if you're in town, it MIGHT be worth it as a once in a lifetime examination of the technology to confirm what I'm telling you here.
Eventually the talent will find the eyes where they're actually looking.