ELI5- why can movies make CGI human faces and movements that look 100% real and normal but video games always look fake even with large budgets?

Question

ELI5- why can movies make CGI human faces and movements that look 100% real and normal but video games always look fake even with large budgets?

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Answer 1

In movies (and cutscenes in videogames) each individual frame takes up to several minutes to generate. In videogames you need to generate at least 30 individual frames per second.