Looks like a super cool feature for disabled players.
Regular controllers are good for people with the default number of arms, legs and fingers. But if you have some kind of disability, it's often pretty unique.
Regular game/computer controllers for disabled folks were pretty pricey last time I've checked.
AFAIK, 3d printing is not that expensive. Many places have hacker spaces or just people who print for almost free.
So I guess it's a huge win for people who need accommodations. I'm very happy for that!
I'm not disabled myself, it was just the first thought I had when I've read the news.
For disabled players, this is also super promising: https://byowave.com/products/proteus-controller