You can't say that a Tesla car represents technology innovation to the same degree the iPhone did. Nothing in a Tesla is technologically groundbreaking, it is more of a product innovation (a high-powered electric car) with good execution.
I don't know that Tesla is a good stock to own right now; I don't know if they'll be as wildly successful in the long run. But you can't just outright dismiss the previous poster's comparisons to the iPhone.