Obviously it's a new technology that has huge obstacles to overcome, namely cost, but as with any technology it becomes cheaper in time as it is improved. And no one is going to spend $60 trillion now to implement it on everyhighway right now but it could get tested in smaller settings, like driveways and bridges that are susceptible it icing. The coolest part of it all is that it could be used for many different purposes. Obviously the solar electricity produced would not be the only potential benefit.
We need to think outside of the box withideas like this to address our world's biggest problems.
What problems are we fixing with it?
I agree that we need to think out of the box, but there is a difference between thinking out of the box and being stupid with outrageous technology for technology's sake.