I would do away with fossil fuels, since we have more efficient and reliable fuels out there. The problem is congress and oil heads love the smell of that money they keep pinching out of us for $5 a gallon. Take a 12 gallon tank, that's $60. Say 5,000 in your area have that same sized tank, that's $300,000! And I could probably guess that almost all 5,000 of those people are working for minimal wage.
Sorry for that little rant, I digress.
The technologies that you listed, none of that should go away. Wireless headsets however should be used responsibly. Don't go walking into a store with one, you'll just get people staring at you thinking you're crazy and talking to yourself.