His quotes are in the article, and yes that can and will be true for Sony as well (some cross gen context), however, the argument is that Lockhart (if real) appears odd when you still have both the S/X sitting there with the games at launch and early on at a cheaper price for the casuals. Hardcore early adopters at launch are flocking towards Anaconda if given a choice, majority of casuals will buy the cheapest box for those games at launch or stick with what they already have.
None of the quotes in the article say all Scarlett games will work on X1 though. Quite the opposite infact.
I agree Lockhart might appear odd during the launch window, but if it actually materialises it's intended to have a service life far beyond the X1S and X1X. Many years beyond, actually. And unlike those machines, Lockhart really is intended to see all Scarlett games running - hence its full fat CPU, big memory increase and SSD.
X1X is going to be expensive to make forever, even with a node shrink and a move to a half width (192-bit GDDR6) bus. And unlike Lockhart, the X1X is simply incapable of playing all the games that are going to come to Anaconda.
In summary: Lockhart is a long term plan for the mass market, intended to go on long after X1S and X1X are dead and buried and no longer getting AAA games. It'll end up far more capable than the X1X and cheaper to make too, I'll wager.