I think you can apply the basic principles to K12 education - especially "cost/affordability" of the education. We here at Indian Institute of Technology Bombay, in Mumbai, India are currently working on creating smart "low cost" physical textbooks which combines the affordability of a physical textbook with the Extended Reality based learning content, which can be experienced by a smartphone/tablet. This not only allows the learner to experience a immersive learning right from the textbook itself but also allows the instructor/teacher to teach complex subjects in a very cognitive friendly way. And all this can be achieved at a one-third of the price of a fully smart classroom. We developed a couple of prototypes for bio-science topics for middle school students, and the initial response was great. Hopefully by next year we will have the first prototype ready.