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.
When you say “normal coffee maker“ are you just referring to a drip/pot? Because honestly, Keurigs take up less space and require less work so if you’re going to do the drip coffee route, then you may as well just do Keurig (sustainably). The results are basically the same.