I don't. The English version [https://en.wikipedia.org/wiki/Geigenwerk] suggests the a hurdy-gurdy wheel is in constant contact with strings, while the viola organista allows for a large number of strings to lower on to the wheel, so individual notes strings and notes are played.

This seems like he moved technology forward, no?

The hurdy-gurdy has 4 drone strings and 2 for melodies, so it's a rather similar concept to bagpipes with regards how it plays.

Also interesting is the origin of the hurdy-gurdy, the Organistrum: http://en.m.wikipedia.org/wiki/Organistrum

Seems like it to me, too. Didn't think of that.