1. Nanorobots that scrub the atmosphere of CO2. When they are just about too heavy to keep flying they fly back to a solar drone that stays in the air for months at a time, drops off the CO2 block and goes back and scrub.
2. Glow in the dark bike tires
3. If all currency evolves to be p2p, would it be possible to have global city states and no federal governments? hyper local communities could solve problems unique to their situation instead of depending on broad federal law
4. Computer games where to goal is competitive cooperation instead of like Starcraft or Age of Empires, consumption and destruction
5. Shark Tank for green energy companies
6. Carbon neutral UN buildings
7. Tax break for white shingles
8. Can you 3d print leather?
9. Humans genetically modify their bodies so that we no longer have body odor.
10. Wearable tech feature that tells you exactly how much weight you lost at all times during the day and night.