content: Because: (a) When you're building prototype hardware for something like this, you trick it out with every sensor you think might possibly be required. You're already splashing millions around for your R&D team so what's another $50k? (b) You don't give a crap what your prototype hardware looks like as long as it drives the same and gives the same kind of sensor inputs as the final thing will do. Once you've got your hardware sorted, only then do you work on making it look nice.