So Tesla is going to dominate the EV battery market at huge scale. Name another product where a single company has held that position in the market.
Not sure exactly what your question is. There is no other product where a single company has held a dominant position in EV Batteries. EV's are still new, and Tesla is going to become the biggest battery maker in the world, period. How is that not going to dominate?
If you are asking about other industries... sure:
1. Intel (microprocessors)
2. Microsoft (operating systems)
3. Google (search and organizing the world's data)
4. Apple (personal computers)
5. Dupont (pretty much every chemical that is needed to make plastics)
6. Corning (the glass on pretty much everything, including that smart phone you are probably viewing this on)
7. Etc etc etc.
Basically, when you are going to more than double the
entire world's battery production, you automatically become the dominant battery maker. And if there is an EV market, people are going to be buying batteries from you or you will be using them for the energy storage market, or you'll be using them in your own cars that you are making. Now, I did not say they will dominate it "forever", but they have a huge head start. Kind of like how Intel had a huge headstart in microprocessors. Or Nvidia (who had a huge head start and also is still doing really really well) with GPU's.
It is important to realize that the way batteries are made now is kind of ridiculous. You have lithium coming mainly from South America, and then it is shipped somewhere to be refined further and repackaged, then that is shipped again to be rolled into batteries, then that is shipped again to companies who need these batteries. Probably more steps than this. In the end that one lithium molecule has done enough travelling to circle the Earth a few times. The Tesla Gigafactory is literally going to have lithium coming from the mines in Nevada straight to the Gigafactory, and out come the batteries. This is all verifiable by watching this video interview with Baron Capital:
Elon Musk interview with billionaire investment legend Ron Baron (11.6.15) - YouTube
Now it's your turn. Name me another company who is going to be able to make as many batteries yearly as the Gigafactory will make? Moreover, as many EV batteries with current energy density and performance architecture as Tesla's. LG Chem hasn't even done site selection....