I think it is a question of time. If you look at the times they have put a supercar there are some years allways between them. even in Ferrari the top of the range, F40, F50, enzo there are more or less 10 years in between. These cars for the companies are not so much about going faster between the fastest but more on the highest level of techology they can bring.... so IMO unless there is something really new to see from Porsche we wont't see another hipercar.... and I'm sad about it...