it's interesting how it's impossible for vaccines to give you 5G radios that are implanted in your body or whatever, because that's just too small to make something practically functional

and yet a company has actually made a working prototype of a SELF CONTAINED CONTACT LENS that includes a cpu, wireless radios, display, and battery, which functions as an augmented reality display.  it actually fits on a human eyeball (somewhat like a full-coverage SPFX contact lens.) 

One is too small and out of the realm of current tech; the other is going to be actually practical before you realize it.