Why am I not driving an electric or solar car?

Following up on the 21st century concepts discussed previously, and considering how rapidly the technology seems to be evolving, I need to ask myself the question...why?  My commute to work is about 45-50 miles roundtrip, in partially rush hour traffic, and it's probably sunny 300+ days a year here in NC.  I drive to the office or the airport in my car, and the rest of the time with the family in the van.  Maybe it's time for me to investigate this more deeply on a personal, professional and investment level.