The point is that Tesla doesn't move anywhere near enough volume or generate anywhere near enough sales to justify its market cap. Its previous valuation was almost entirely a prediction of future revenues rather than a reflection of current ones.

And it's hard to say what class the Model S fits in. I don't think 7 or S is right, despite the price point. Those are both full-size luxury sedans, and while the Model S may be a full-size sedan, it's hardly luxury. Its interior is closer to a 3-series or E-class than the top-of-the range luxobarges. That's not a knock on build quality, just the reality of battery power currently being much more expensive than ICE. You've got to shave cost somewhere, and Tesla shaved it off luxury.