The first link is interesting, it does say the saw signs of activity in the same brain region of a blind echo-locating person as a sighted person who is activit

The first link is interesting, it does say the saw signs of activity in the same brain region of a blind echo-locating person as a sighted person who is activity looking at something, but it is hardly a smoking gun. Perhaps if you are defining "3d" information as something very primitive to the point of being "is there something directly in front of me", but nothing even as close as rich as even the quite crude 3d information being conveyed on the hacked oscilloscope outlined by the OP. I do see technology eventually giving blind people some sort of "sight" back, but not for quite some time, perhaps after there is some sort of workable neural interface that currently lives solely in sci-fi.