the Hololens "Typography" page has such an uncanny mixture of the practical and buzzwordy and utopian scifi https://docs.microsoft.com/en-us/windows/mixed-reality/typography "Text in both the physical world and the virtual world needs to be legible and readable. Text could be on a wall or superimposed on a physical object. It could be floating along with a digital user interface. [...] For the user's comfort, two meters is the optimal distance for placing holograms. We can use this distance as a basis to find the optimal font size."