- Mega Castings, casting have been used before, but never at the size Tesla does. Tesla has costume co-designed machines and they developed their own alloy to make it work.

See: https://youtu.be/BwoiFC-HwPE?t=273

- Structural Battery Cell (Packs are structural in some cars, not cells)

Eventually these two things together will basically be the main part of the car. This is nothing like anybody else does it:

https://cdn.shopify.com/s/files/1/0173/8204/7844/articles/1_...

- Fully integrated heating/cooling system 'Octovalve' (https://www.youtube.com/watch?v=eGffUODWWSE)

- Unifying chips to central computer

- Stainless Steel Exoskeleton

You can see a full breakdown of a last year Model Y here (same guy that did this interview with Elon, was very critical during Model 3 and impressed now): https://www.youtube.com/c/MunroLive/videos

That is of course only for cars, the improvement in battery production that Tesla has made are arguably more interesting. A whole video series on this: https://www.youtube.com/watch?v=_ZQ5OmYf-Vg&list=PLyvdbTy3v1...