Yes it is just a matter of time, if not for the learning curve for a 1-man-show like me I would've adopted realtime rendering in a hearbeat. Now UE5 makes an even stronger case for game engine rendering for small studios.

Granted, for production quality it might not actually be 30fps "realtime", and there are still some limitations like dealing with complex ray-tracing (imagine multiple layers of transparent materials each with reflection and refraction) and high-end sims such as fluids....but in most applications it is way faster than traditional render engines used in film and TV.

I'm working on a project that takes my machine 12-minutes to render a frame....I cannot wait for the day when a game engine can do it even if at 12fps.