Sam Pearce is raising funds for Loopwheels: for a smoother, more comfortable bicycle ride on Kickstarter! Reinventing the bicycle wheel: for maximum comfort over bumps and less vibration from the road, even on a folding bike.
Eyesight-Adjusting Screens: This prototype concept is hi-tech; rather than having to wear glasses to see better, it lets the object adjust to your eyesight. This idea by Ryan Jongwoo Choi is called the iFree.
RYNO Motors' single-wheeled electric scooter is self-balancing, has a turning radius of zero when stopped, and only takes up about as much space as a folding bicycle -- so it's conceivable that commuters could bring one onto a train.