The old milometer but web enabled either via Bluetooth and phone or some other method. So you can keep online records of you daily mileage without knobends focussing on your average speed, power or any other metric.
Swytch bikes have an e-Penny, I've seen it on the adverts.
Shimano used to make electronic-shifting 3 and 4 speed hub gears.
I'd like to see STI / Ergo style shifters for 5 or 6 speed. And lightweight rims and tyres for 26 x 1 3/8 wheels. And a carbon Brompton.
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