Not saying some things he has promised aren't somewhat a pie in the sky...
Unfortunately, Elon Musk is Elon Musk.
Not many are rushing to buy econobox EVs.
The more expensive cars being included in "average price of a new car" are going to include pickup trucks, minivans, and SUVs. The equivalent model here is (AIUI) Tesla Model X, whose base price would be about $80k, whose competitors are ranging more around $30k-40k base.
EDIT: (HN Throttled, can't reply, replying here)
I agree there is a premium, but I do not agree it's considerable considering a) people buy a payment and b) we're in a low interest rate environment where people can stretch for a luxury car like a Tesla due to low carrying costs of the auto debt.
Why? https://youtu.be/XCvwCcEP74Q?t=798 (13:17-14:15 is the relevant time window)