You should probably watch the actual reveal, it's already on YouTube. The glass was already addressed and he gave it a specific focus. Even claiming it can withstand an atomic blast.
It might be able to withstand an atomic glass but it's still going to crack if a big enough stone his it at 70mph.
I'm not saying that Tesla windshields are vulnerable from that, in fact, most windshields aren't. However it shows that resisting a blow from a hammer that is neither sharp nor hard is not a conclusive test.
The difference is in how they break. Laminated glass will generally crack, but otherwise stick together, while tempered glass will shatter, but into less-sharp pieces (to minimize the hazard of broken glass).
I don't know how much of this matters, but it stands to reason that what works on a side window might not be the same as what works on a windshield.
… but actually breaks easier than the iPhone 8 glass.
https://www.youtube.com/watch?v=8vHCBwJVeO4
I've dropped my case-less iPhone X 5 feet onto bathroom tile and not even a noticeable scratch afterwards.
(German Consumer report: iPhone X is most brittle of all iPhones)
the semi: 1. costs much more than an iphone, which we're to assume accounts for the expensive windshield. 2. the windshield can be as thick as your attitude.
Metals arent particularly strong. Glass, plastics, etc are all stronger (yield strength). But boy are they ductile, and very tough. Iron can take, literally, an infinite number of loading cycle.
You can make ceramics, glass, etc better but the overall performance package of iron is very hard to beat.
If I were to dismiss SpaceX as 1950s technology with modern electronics and engine technology the soviets mastered in the 60s would you be annoyed?
So why dismiss the truck manufacturing industry? Semis are very thought out solutions for their domain.
I have no idea how automotive glass differs, but I imagine the difference in weight and thickness requirements does impact things a lot.
This reminds me of the unfolding problem of sun roof explosions.
The full stream is only on YouTube in pirate form so far, so I don't expect links to last. The Tesla channel itself doesn't feature it yet.