MacOS primarily

What you perceive is vastly different than a continuous filmstrip. Have you ever tried to watch unstabilized footage from a person jogging? Totally unwatchable! But your brain smooths it out better than the best steadicam. Tilt your head from side-to-side: what you perceive stays upright. And of course you know hat your eyes don’t smoothly pan from subject to subject but are constantly “saccading” around, but your brain processes that all away.

Visual processing is amazingly complex. Its also interesting that our other senses have different levels of processing. Our sense of smell is nothing compared to a dog’s, our sense of hearing is nothing compared to a whale’s, etc. A metaphor I heard once (don’t know how accurate it is) is that when a human walks into a kitchen they might smell that a stew is cooking. A dog would smell both the overall smell but would also smell the individual carrots, peas, chunks of meat, etc.

Is it just the external surface that's a display or when you're inside can they do a 360 projection around you?

Microsoft wants to own tools crucial to the mainstream of software development. They also want to own the cloud infrastructure on which those tools depend. Today, they might lose dimes on every LLM call. In five years, they’ll make a penny on orders of magnitude more calls. Microsoft has many flaws, including cloud capacity, but they aren’t short-sighted about investment. (I used to work in DevDiv and Azure Machine Learning.)