This is quite exciting in that it removes plastic waste. I see no reason why different companies can’t make different shape ones to maintain their lock-in. I expect a knock-off market to pop-up, but that exists with plastic pods too. It’s a step in the right direction at least.
I was surprised to learn that the store brand k-cups around here are already fully compostable. It’s just a biodegradable plastic ring with half a sphere of coffee filter on the bottom and a paper disc on top.