I really liked the segment [here](https://youtu.be/Vw21X2jKwCM?t=1m47s). It seemed like just a cute exaggeration of all the things you can do with perception at first but when you think about it, the ability to empty an enemy's weapon when you sneak up behind them would make a perfect perk for Fallout. Much like the perk that allowed you to disable robots from behind.
How cool would it be if you could order a stealth-oriented companion to do this while you lay in wait for an ambush?
So, with this video it looks like as you go down the perk tree, this same announcer will tell you what each perk does. The cutting at the end seems to display this mechanic.