One nice use for these tiny fonts is large text in terminals. Unicode now has 2x4 (from Kaypro), 2x3 (from Teletext, TRS-80), and 2x2 mosaic characters. Unicode also has 3x3 large text (from HP terminals) but font and terminal support is limited.
I assume you mean Braille is the 2x4 set. What range introduces 3x3 codepoints?
I assume you mean Braille is the 2x4 set. What range introduces 3x3 codepoints?