I think it would be an innovation in the keyboard world to have switches made with conductive stems, which would open doors to programmable or electronically active keycaps. We can already read and write info to the chips in our sim cards and credit cards, why not put that tech to use in the keyboard world :)
peaceful_distanceCause a keyboard is not a credit card. It makes zero sense, financially, mostly, to do that just for a very niche market who are willing to pay for it. You'll have to redesign the whole keyboard, making it hundreds of dollars more expensive, and you end up with just a quirky little feature no-one cares about. I's not a wise business move.
What would be smarter though, is to fit in a tiny coin battery into a keycap, and then, maybe, just maybe someone might want to buy this for 30 bucks