As 3D gets better and better it becomes harder for the observer to discern what has been filmed, and what has been created in 3D. Blurring the lines of reality makes it easy to suspend disbelief and become more immersed in the story being told. Good for storytellers.
This is a nice example of really good 3D rendering, with a brief second video of the process that took place to get the final cut. Clever stuff.
Next time you watch a movie, see if you can tell what’s real and what’s not.