> There is a reason Pixar and Arnold and Vray and most other major industry renderers are moving to the GPU
The reason is that those softwares need to be sold to many, and a big part of studios are doing advertise and series. GPU rendering is perfect for them as they don't need/can't afford large scale render farms.
About your example, that not honest. It's full of instances and perfect use case for a "Wow" effect but it's not a production shot. Doing a production shot required complexity management on the long run, even for CPU rendering. On this side, GPU is more "constrained" than CPU, management is even more complex.
The reason is that those softwares need to be sold to many, and a big part of studios are doing advertise and series. GPU rendering is perfect for them as they don't need/can't afford large scale render farms.
About your example, that not honest. It's full of instances and perfect use case for a "Wow" effect but it's not a production shot. Doing a production shot required complexity management on the long run, even for CPU rendering. On this side, GPU is more "constrained" than CPU, management is even more complex.