You get what you pay for. If you want to pay absolute bottom-dollar prices, you're going to get absolute bottom-dollar service. If you want to pay more you can and will get more services. I've hung out at an on-board bar on a 777 in the last year on a flight from Australia to the US, but the ticket cost over $8k USD round-trip.
It's possible to have a private shower and bedroom onboard an A380 flight, but you will pay dearly for the privilege.
There's room in the market for both extremes as well as in the middle. I doubt you'll get a buffet service on a round trip ticket that costs <$500 (trans-oceanic, at least) as it likely is not economical to offer that. That being said, there are airlines that are offering improved options even in Economy cabins... they just charge for it. An example is Air New Zealand's "Economy Skycouch" https://www.airnewzealand.com/economy-skycouch
So with the possibility that this design could save on fuel costs, maybe airlines will be able to sell upgraded experiences at prices that are today bare-bones. Time will tell.