I believe that this will be an extremely hard sell. This is a completely new car, and essentially a totally new brand with no heritage other than the "Jaguar" name; I believe that we have seen the end of Jaguar.
If Genesis is a hard sell, it at least has some legacy from Hyundai's Genesis models. Jaguar bankrupted its legacy when it stopped building and selling cars, cars that carried little from classic Jaguar models; but the modern XJs were at least long and low and sleek, like Jaguars had always been. This new model carries none of this legacy.