The thing about "autonomous AI" is that it isn't what the large, prominent "AI" companies are researching. The money is being dumped into LLM companies for the most part, and LLMs aren't a likely way to get fully autonomous robots.
I'm not saying that it isn't going to happen, especially because they exist somewhat already (drones and palantir). However, when people think "dumping money into the AI industry", most are thinking of OpenAI, Anthropic and the like, especially since that is actually where the majority of money (and power) is going.
I personally think 5 years is a stretch, but I hope the AI killbots come for me first if I'm wrong, because I wouldn't want to live on this planet anymore. Also, I'm not sure that this would be a thing in practice, since they could extract labor out of you instead of killing you with robots simply for having a non-registered network device.