https://www.tapwithus.com/product/tap-strap-2/ seems like a very pragmatic option, tech-wise - I'm not convinced floating will ever actually be good. Bouncing off a surface is extremely efficient, self-calibrating, and basically always available in some form (e.g. tap on yourself).
Make it look like knuckle dusters and it will look cyberpunk too
Nah, typing on a keyboard is faster and more precise. I think having a split keyboard with each side on the cummerbund of your plate carrier (split by the mag pouches or med kit you have on the front of your carrier) would work better. Assuming you actually want this to be practical and not just an aesthetic/signaling thing.
Now if smart/digital contacts could just get around all the patent fortresses / other issues, and actually produce a working product. Saw research prototypes back in the early 2000's. Apparently people are still trying. [3]
[1] https://www.manus-meta.com/vr-gloves
[2] https://writings.stephenwolfram.com/2019/02/seeking-the-prod...
[3] https://www.digitaltrends.com/cool-tech/augmented-reality-co...