Like a hot oven, space vacuum, or maybe micro surgery.
If the hands implement the same signal protocol, he should be able to switch them out.
It’s cheap and I’ve watched it be developed since the beginning. There are multiple ways to restore a sense of touch, this appears to use the method which stretches in the skin.
There’s also a method of restoring the senses that uses electrical current. It was fun to watch all the undergrads in the lab electrocute themselves lol. The reality is skin stretching is consistent; where as how electricity flows through the body varies wildly between people.
The one linked in my comment uses vibration:
https://www.psyonic.io/ability-hand
Which has less of an impact long term (Aka drying out skin from twisting, etc)
It’s an extrapolation machine! From very little data the constructs and sensations we feel, the qualia are just incredible.
Nonetheless, great accomplishment for humankind.
Or controlling crowds of protesters by inducing pain.
Taking it up a notch, reading emotional states could help figure out the general mood of the population, as well as specific subsets or individuals, and either figure out how to make potential dissenters happy (à la Brave New World), or get rid of unsatisfied members of society (1984).
Finally, I think (not sure) I remember Musk talking about one day storing and retrieving memories via such devices. This would allow to pretty much rewrite individual and collective history. Most definitely way beyond our current technology’s capabilities, but way better than whatever Big Brother could ever dream of.
Humans in capitalist societies will be split into two "species", plain vanilla lame brains like you and me, and the augmented super-geniuses who've augmented their brains with the sum total of all recorded human knowledge.