If you instead think Tesla's promise is consumer cars, Tesla's valuation is roughly equal to the entire rest of the global auto industry, despite being only a tiny and declining fraction of global sales. The relevant competitors then are Toyota, VW, Ford, BYD, etc. etc. Objectively, as a consumer auto company Tesla seems to be stagnant and falling behind.
I guess they're also hyping vaporware humanoid robots; if you ask me a future where a significant proportion of all families on earth purchase a humanoid robot seems completely implausible. It's very Jetsons though. Maybe they'll start building flying cars too.