Comment by starkrights

Per the LTT video [0], the new Steam Frame controllers will have a (separately purchasable) accessory pack which includes a knuckles-like strap. Supposedly the controllers have enough capacitive-sensing ("on every input surface, and on the grips") for knuckles-like five finger tracking.

Linus says "just like" the valve knuckles a couple times, but who knows how they'll feel comparatively. I've personally never used the knuckles, but they seem like they'd have a different enough feel from these to maybe make a difference.

[0]: https://youtu.be/dU3ru09HTng?t=246 - timestampped @ controller section.