It's really cool how somebody runs up to her and cuts her hand, but we can't see the perpetrator because he is blotted out from view. Think of all the evil an organization can do when they have henchmen who aren't visible.
But what about just turning all this technology off? Would it be implanted into our eyeballs, or our brains? What if none of it can be turned off and we become slaves to it? And how would we really know if the technology is turned off? What if we think it's turned off, but it's just showing us what ever the master wants?