What Exactly Does Threat Marker Do?

Is all this attachment does is highlight them on your screen for a limited time? Or if you get a lock, does it make the bullets angle towards the opponent?

We already know the laser increases Bullet Magnetism, so what in the world does this thing do? My guess is that it keeps the reticle on the opponent, but I can’t seem to tell.

Can your allies see the lock?

It marks threats, so you can see them through obstacles. Don’t think it marks them for teammates.

Wall Hacks, 343i didn’t learn their lesson with Promethean Vision

Spotting is in Battlefield, but its way toned down compared to this

They did a quick demo in the livestream.

Link