Earlier quoted context omitted.
Except that you would have to pipe giga/terabytes of data to/from the cloud - that is why lots of in house rendering and catalogue systems use Fibre Channel and similar technologies - one of the bottlenecks is I/O from the workstation
It wouldn't be the cloud, it would be local gigabit ethernet and thunderbolt interconnects.
I was referring to using something like Amazon services for rendering