Heated Windshields

I have always wondered why you can't put the same or similar heating elements on the windshield as you have on the rear windows. The elements don't interfere with vision and it would be (I think ) better than the defroster. Just a thing I've been wondering for lots of years. By the way, I just turned 70, and being as you're my favorite car manufacturer I wanted you to have the idea if it was worthy.
Chris B 10/19/2012
I used to drive a Renauit Laguna approx 12 years ago in the UK. It came with a fine mesh in the front screen to provide heat - it cleared mist on your wind shield very quickly - much quicker than a hot air blower. Not seen it on any other cars however.