That's pretty cool, but in order to use it on my desktop, do I need an all-new font widget that can control every aspect of the specification? Or do I fiddle on a webapp until I get the one that I want, download it and use it as normal... and now I have a thousand variants of Decovar that I have to squint at very carefully to differentiate?

I'm not complaining about choice, I just want to know if anybody has thought about usability.