I hate to say it but Mr Average won't be spending $400K on a hypercar. To engineer a vehicle of this type are astronomical, to say they will sell them "just to prove a point" must mean they have millions to burn. I don't know of ANY company that would spend money with no ROI in site.
Lexus in and of itself is the "premier" line of toyota, like infinitiy, acura etc so having to prove they can engineer a better product isn't necessary, as that's what they are doing already. This reminds me of the Honda NSX: it was a great car, but no matter what, it's still a honda and if you're going to spend the money on a hypercar, there are much better ones to be had.