Not sure if these are within the scope of what you guys do (a couple are 'out there') but here's some:

- digital currency that doesn't need network connectivity nor blockchain to do a transaction (just device to device)

- systems that actively monitor for suspicious/anomalous network activity and respond in real-time (security that can prevent Sony & OPM hacks) or simply put: security products that will stop the Chinese from hacking US networks

- urban farming

- fish/seafood farming

- batteries from garbage

- products that save rain water - from your home's rain gutter or from the roadside curb - and into a cistern

- a way to lift third-world countries out of their situation so there are no more third-world countries (all of Bill Gates' and Oprah's money have barely made a dent)

- underwater or ocean based communities

- cleaning up the 'Great Pacific Garbage Patch'

- more women/female programmers/engineers (it IS the pipeline and perhaps even the culture)

- an actual, real hoverboard

Are you really going to read all these comments or did I just waste my time writing this??