Edit: Since this post, I've created an interactive tool for binary visualisation - see it at binvis.io
Hover and click for more.
Clicking will show you high-detail versions of both visualizations, and let you look up the binary hash to see what it is. I've used a square Hilbert curve layout - the files start in the top-left corner, and pass through the quadrants clockwise.
I spent hours looking through thousands these visualizations today. I find them eerie and rather beautiful - an entirely different perspective from my day-to-day interactions with malware.