Nature:
This is the vision of two Californian start-up companies that are set to launch swarms of small imaging satellites, which, by virtue of their sheer numbers, will be able to revisit and photograph huge swathes of the planet as often as several times each day — a frequency much higher than that achieved by current Earth-observing satellites.
As is typical with modern technology, it’s half way between “shit that’s cool, I want it” and “oh man, that sounds like an Orwellian nightmare” .