The quantization of light is going to be a serious limit. The detector elements of a camera could be made pretty sensitive, but they can't detect fewer than one photon.

In NLOS (and traditional photography) the scene to be imaged is illuminated with N photons but the detector only receives M photons worth of signal back, where M<<N. So future people are going to need:

1) helmet-mounted lasers capable of sustained very high power output, to increase the signal enough to get over the quantum detection threshold

2) to slow their roll, so a lot of imaging can occur before they round the corner

or both. There are already practical limitations on laser power output in air because the air will turn into plasma along the beam path. Similarly, for NLOS you need to not burn up and destroy the surface that you're using to bounce the light around the corner.