Agreed ^
Also to mention, falling oil prices that will make the switch to a Tesla less appealing at this point. If they were to raise prices, I think they'd end up losing a lot of potential customers.
But I doubt their prices will go up because the model S has been around for a while, their manufacturing processes have become more efficient and a lot of that invested R&D has been getting paid off, it will just balance if not lower the cost.
Even if they have to eat some loss, it would not be in their best interest to raise prices. Sort of the same idea with Sony and their PlayStation, they'll make up the loss per console sold through volume and future sales. Eventually everything works out and everyone's happy. Greed never helped anyone, not in this day and age.