Until it's tested in court, the legality of that restriction is highly questionable. (Which is not to say that you can ignore it with impunity. If you don't have the money for a multi-year lawsuit against a billionaire, you might not want to violate it.)

Presuming that such "EULAs for cars" are not legally binding, the next step will be cars that simply will not do the "forbidden" action, because their software detects and prevents it. Thence comes the next round of lawsuits...

Which will only last if they're the only ones that can make self-driving cars I would think.

Edit: Though you can have your car join that network sooo. Mostly just means they don't want to sell to Uber, heh.

This is the biggest part of the announcement.

Absolutely monstrous.