But if half of people in the world have Teslas with self driving, Tesla can also sell entertainment (they've already started, with video games!). They can also sell fancier version of self driving where you can "rent" your car (Uber-like). The hardware is a gateway to potentially more services.

I still feel that Tesla is overvalued, but there exists a potential future where it still has room to grow (I'm not sure I'd like that future - so this, coupled with the stock volatility, kept me from investing in Tesla. Which, TBH, was a poor decision so far :D )