Your desire sounds a bit like the fluid based, piezoelectronically pumped haptic display presented by Shultz, et al, in 2023 [0]. I can't speak as to whether th

Your desire sounds a bit like the fluid based, piezoelectronically pumped haptic display presented by Shultz, et al, in 2023 [0]. I can't speak as to whether these could be packed in enough. The video indicates they can make cells of 2mm wide. [0] https://www.youtube.com/watch?v=j_rErbhxNFM https://www.youtube.com/watch?v=j_rErbhxNFM (4 minutes