I think the popularity of the double bass coupled with the demands of double bassists for instruments and bows that offer a higher degree of tonal and playability are pushing luthiers to elevate the art. Smaller basses that equal or rival larger ones, ergonomic models, detachable necks, etc. There is a lot of very cool stuff going on today from all corners of the globe.
Bow makers are doing the same, both individually and commercially. For instance Coda has a model with a "different" frog design:
http://www.codabow.com/features/deta..._inf_frog2.jpg
And although very different from yours, when I saw your picture the Coda bow was the first thing I thought of.