Nikola Tesla always thought that this was a side effect of a very serious disease he had as a child. That was probably due to him never meeting other people like him, though as some comments here show they certainly exist (I count myself among them).

Some people with this ability can draw what they imagine very well, while others are not good at all. I don't see an issue - even if you project some image on a blank piece of paper so people just have to trace it everybody won't have the same results.