I don't think we're close to a situation where they send us into a Matrix. But I can see a scenario where they are connected to more and more running systems of varying degree of importance to human populations such as electrical grids, water systems, factories, etc. If they're essentially given executive powers within these systems I do see a huge potential for catastrophic outcomes. And this is way before any actual AGI. The simple "black box" AI does not need to know what it's doing to cause real-world consequences.