I only looked at one specific scenario: a long daily commute. Most people do not commute in Ferraris, unless they have too much money to waste. As Tesla Motors is not making a commuter car yet, the Model S is all that we can compare to. And it does not work, unless the customer is buying the car just because he wants it.
Additionally, I don't understand what "luxury" a Tesla offers to the driver. The range anxiety? The inability to run headlights or air conditioning whenever the driver wants? What else is there? A good radio? Oh, I found one. It has power steering.
It’s a status vehicle, well-crafted, beautiful exterior, beautiful interior. It’s very fast, with a full-size sedan rivaling most sports cars. There are many reasons to desire one that have nothing to do with putative economy. It just happens to be electric instead of internal combustion engine.