One of the most interesting things I came across at the 2022 NAMM Show was a Narrow Keys keyboard (https://www.narrowkeys.com/), which allows pianists with smaller hands to be able to play big repertoire that requires a much wider hand span.
This keyboard was inspired by the work of David Steinbuhler, the maker of the DS reduced size keyboards that are designed for acoustic pianos. You can watch my interview with David here:
These Narrow Key keyboards are custom built by PianoArc, the maker of the iconic circular piano that Lady Gaga made famous.