Hello,
I think it is hard to for see the impact of open sourcing on robotics for the future. But as I see it, since I have started the InMoov prosthetic, by sharing the first 3D printable prosthetic OpenSource, it has had so much impact on the last 3 years about affordable prosthetics.
If the same wave impact is seen on robotics it will be tremendous.
Again, after I started InMoov robot, we have seen many other robotic 3D printed projects such as Jimmy(intel), Poppy, Maki, Plen2 and many more. These projects have all started with the same goals, sharing and being Open Source.
This year I have seen 3D printed hands on robots during the Darpa contest.