A revolution is about to arrive in computer games, and amateur and smartphone video:
https://www.bbc.com/news/business-52541218
https://www.bbc.com/news/business-52541218
In Hollywood, special effects have used ray tracing for a decade. For an important sequence, computers could churn overnight for a single frame. To do this for games in real time, you need to condense that to 1/60th of a second. Processing speed has now caught up to the task.