Computational power for rendering movies in real time

This probably is not the right forum for my inquiry, but hopefully somebody here may be able to point me in the right direction.

Let’s assume a movie completely generated by computer - something like, say, How to Train Your Dragon, in so-called 4K resolution. What kind of computing power would it take to render it in real time at 60 fps? Is that even feasible with today’s technology?

it need to be perfect and professional to create like how to train a dragon and part 2.

How to train your dragon… Doubtful… But eventually!