They basically have computing per energy as an efficiency spec and then they show how that spec increased by 20-33x compared to an "Intel Skylake" machine.
Google also added some features, like a custom speed vs quality tuning thing, and single and multi-output transcoding.
What was interesting to me is the video core was made with "Catapult, a C++ HLS flow from Siemens".
It depends how literally one wants to take the law.
The "law" is doubling density every two years.
So strictly speaking it is done because it has taken longer than two years. But if you choose the looser interpretation and simple read it as, transistor density increases with time, then it's not dead.
Probably the bigger deal is cost per transistor is actually going up with the new nodes.
For example one could try to clone many of these: https://en.wikipedia.org/wiki/List_of_7400-series_integrated...
Another fun project idea. Make a 1bit processor slice. Then show how many slices can make a larger system. Similar to:
"Using LSI processor bit-slices to build a PDP-11—A case study in microcomputer design" https://dl.acm.org/doi/pdf/10.1145/1499402.1499444