If we could focus what we've learned from making smartphones to cleantech, we might get some really good results in surprisingly short time. I like to compare modern phones to hang gliding instruments. A top of the line instrument costs about 1000€, but is technically far inferior to just about any phone around. The market however is less than 1/10000th of the cell phone market and there's very little competition, so the situation is stable. If Nokia made them they would cost 50€.

So for gliding instruments the market isn't there, but are there any cleantech alternatives that have a greater potential market? What kind of devices are currently ineffective, big and clunky or just too expensive to really make a difference? How can we fix that?

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