Hmmm, that looks like about $2000 at DJI prices, way more than I'd spend for GoPro gimbal regardless of how well it works. Now if it were in the $500 range it would be very interesting and sell by the truckload but we all know it's going to be way more expensive and require a WKM to make it work.
A low end version at a good price that works on a Naza would be nice...
Ken