I like the idea of a wind tunnel/water flume that has barn-door sized paddlewheels instead of propellers. If you move air/water in big blobs instead of thrashing it with a fast moving propeller there would be less turbulence.
And florescent green smoke/bubbles.
As for the 4K CPUs—if they were quad core you only need 1024.
I believe newer chips ship with up to 16 cores. ...and 4K Von Neumann CPUs would about equal one qubit-based quantum processor. They exist in the labs.
The best video I've found since re-viewing that last one is