My first bicycle was used, and had been my older brothers. So... I can state with some certainty that bicycles have been basically unchanged for 65 years. My Dad's Roll-fast was near identical as well and was from the late 1930s. Even my first geared bike (a 1963 Schwinn Varsity 10 speed, with fiction shifters) is identical in most respects as current bikes.
Bicycles are what is called a
mature technology. I wouldn't hold my breath waiting for some big break-through.