Here's an interesting thought from Ian Callum, designer of the Jaguar XK — safety regulations are imposing safety requirements on cars that affect their design. One day, they'll be so strict that we won't be able to tell cars apart.
Legislation both in the United States and Europe are forcing regulations on the designs of vehicles for safety reasons, from telling designers what the angle of the windshield must be to dictating the vehicle's dimensions. Callum says this is why the XK looks just like the Aston Martin DB9, and why the Mercedes S-class could be a twin brother of the BMW 7-series.
Are his words prophecy, or a glorified excuse for the much-criticized Taurus nose of the XK? We sure hope it's the latter.