1. Artificial Photosynthesis: It would be the key product to making the hydrogen economy feasible. Free, clean, energy with the side effect of reducing carbon dioxide (ending global warming), and producing clean water. We could also use artificial photosynthesis to make food and lumber in the future.
2. Cultured Meat: Meat would be grown from cell cultures in factories which would make meat production cheap, safe, clean, and more healthy. It would free land from cattle ranching, produce more natural land, and no meat would be contaminated with E.coli, or other pathogens (no mad cow disease). Technically everyone would be vegetarians because no animals would be harmed in the production of cultured meat.
3. Quantum Computers: Just the next natural development.
4. Genetic Enhancements: Parents will genetically enhance their embryos. Children would be smarter, stronger and better looking, and they would promote a better society. People who have children through natural processes would be considered reckless and dangerous to society.
an engine that works throught cynetic energy only and produce electricity from that alone. Maybe with magnets. I'd like vehicules to be able to hover becaus all we'd need whould be cutting the grass below the road with machines. No more hot, pollued asphalt on the roads.
some kind of electronic checkbook calculator that's wireless connected to your bank account with a built in personal finance budgeter. Something that would help you spend and save wisely and a reminder when your shopping or out and about.