Probably the majority of all innovation ideas is nonsense. The “Nonseum” (site in german) offers a funny abstract of things the world does not need.
Credit: Nonseum
I don’t want to withhold the following short excerpt from the mentioned website (translated from the german original):
Basically we distinguish three kinds of inventions:
1. Inventions from comfort
2. Inventions from self-defense
3. The inventions which one would have better give up.
Nevertheless nearly every idea may contribute in some combination to enhance an existing product, service or business. But as often it needs to be at the right time on the right place.

