Yup, all correct. Also LCDs themselves and in particular active-matrix LCDs are a recent materials advance. Also, for the kind of thick-walled microscopic pressure vessel I was describing, the situation is worse than sigma = Pr/t, or Pr/2t for spheres, which is the thin-wall approximation.
Those structures are in the category of things the humans can be confident are possible, because the required pressure is only a few times higher than the tensile strength of buckytubes and nano-aggregated diamond, but have no idea how to make.
Those structures are in the category of things the humans can be confident are possible, because the required pressure is only a few times higher than the tensile strength of buckytubes and nano-aggregated diamond, but have no idea how to make.