I think a lot depends on Lockhart. I would be surprised if Xbox One X continues to sell when Xbox Series X launches but who knows what production improvements will let Microsoft offer; it may well be they can offer a number of price points and I have always been a fan of options but your have to ask yourself at what point do they drop support for consoles they are selling now.
I wonder about the possibility of aggressive trade-up offers by MS once the initial launch demand period wanes to incentivize purchases of the new models. Then the units they acquire can be refurbed and re-deployed in GamePass subscription bundles.