Fun visualisation, but I don't see that one as being particularly useful (what does it really represent?)
As someone who has looked through many different types of files in doing quite a bit of RE, I've become able to separate out different types of data just by the "feel" of how it looks in a text editor; Z80 and 6502 code, x86, MIPS, ARM, bitmap images, and compressed data all have different "textures" to them.