Yeah, I know, right? That's the one big loophope in the concept and where it all breaks down. One possibility is that the movie pulls an Inception, ie you're not really seeing the real world, but moreso a digital recreation of the real world, because I can't really see this working otherwise. If this were really the real world it's happening in, things would be manifesting itself more in a physical manner, not a digital one like we see here. We'd see them taking over computers, take over the traffic lights, ground traffic to a halt, override self-driving cars, etc. The very idea of a digital world bleeding into the real world just isn't physically possible in the way envisioned here, and IMHO makes it a hard sell.