Performance per watt—basically, or how much computing power you can get out of a battery charge, is the new benchmark for computing. I grew up in the PC-era and Moore's Law. I'm conditioned to thinking about battery charge by developing mobile phone apps. The wearable era will be more exacting.
Apple, following the success of the iPhone is expected to reveal the next big thing wearable AR glasses in 2022.
Apple is expected to reveal a huge advantage in overcoming the physical limitations that have constrained other AR devices like Microsoft’s HoloLens. Analysts, for now are calling this era spatial computing, at the core are post PC era ARM-based systems on a chip (SoC). Highly integrated, sub 6nm, low power post PC-era systems. page (paywall? try opening the link via the Wayback Machine).
Apple "Glass" fictionalized