I do wonder how stuff like this will shake out. I will use a credit card, always, with any vendor that doesn't pass along credit card fees to the customer in some way. (Why would I choose otherwise? The credit card gives me rewards, and better fraud protection.)
But more and more, I see companies charging "convenience fees" for credit card usage or offering "discounts" for cash/debit. Hell, T-Mobile just started requiring you not use a credit card to get their $5/mo autopay discount.
So this is all cool (and perhaps would make it easier for people who don't have a credit card to pay for Netflix), but I don't see why I'd use anything but a credit card to pay for my Netflix subscription, unless they offer discounts for using FedNow. Which... they probably won't?