Not getting it so much, what are your worst fears?
Serious?
The abilty to control an individuals response, say Putin.
It's a bit frustrating that they chose powerful politicians to "show off" this new development, as if to say "yeah, look what can happen now...".
If this was solely a research development then there was no need to do that, the demo actors would have sufficed perfectly fine.
It is quite impressive.
You could make a nice video showing a politician accepting a bribe now, and he doesn't even have to be present
While impressive it is a long way from standing upto forensic scrutiny at any reasonable detail level - the mouth lines/geometry around the mouth at times is obviously wrong, angles on the eye details off a little with the angle of the head as well.