What technology are we still waiting for ?

[Speed 3]

For all the amazing progress we've seen in cars over the years, one thing that continues to irk me is we haven't yet elegantly solved the windscreen problem. Wipers haven't fundamentally changed in a hundred years and make even the most beautiful cars scarred. Surely to buggery we should by now have invented some kind of force field, air cushion and/or effective coating to repel rain. I work in aviation and even the latest Airbuses and Boeings still have them.

Is there anything else we should have engineered out by now or do I just have OCD ?