[ashark]

Probably just an effect of longer shot lengths (some modern action films are under two seconds average shot length) and not being able to color-correct the hell out of every individual scene separately. Both made possible (or practical, anyway) by digital editing. Without them films tend to be more naturalistic. And like your average stage play they leave you space to think about what you're watching.

You want actually stage-like films you have to go back farther. Wide shots galore, with stage-style blocking. Check out the opening scene of the original Ocean's 11.