In the same vein as "agents watching your screen" - what about "agents watching your posture"? Pages like [0] and [1] exist because people experience great benefits from becoming (even slightly) more aware of the way they are holding their bodies. Imagine this idea taken to the extreme, with a local agent intelligently reminding you to tighten your core, square your shoulders, relax your tongue, or warning of potential incoming RSI?
> He sat as still as he could on the narrow bench, with his hands crossed on his knee. He had already learned to sit still. If you made unexpected movements they yelled at you from the telescreen.
[0] https://news.ycombinator.com/item?id=35939206
[1] https://static.virtualsaleslab.com/vsl-poc/ppp/