NASA has already designed a Space Solar Power satellite which can, in theory, convert sunlight in space to electricity and beam it back to Earth via the microwave spectrum. The received power (on Earth) will be in gigawatt order, and I presuppose the beam divergence will be small enough for the beam to be able to cause some significant damage even in small temporal frames, should it be used for such alternative purposes.

Now, I wonder if it could be possible to retrieve gait data from people inside buildings via infrared or x-ray spectrum satellites, given sufficient power output and resolution...

"Stephen Wolfram is the creator of Mathematica and is widely regarded as the most important innovator in scientific and technical computing today." - Stephen Wolfram