Digital Foundry just posted their video discussing the matter into much greater detail and where they stand on the subject Xbox Series X to support current Xbox One which needed it's own thread:
- Most games for a console generation don't tend to start pushing boundaries for a while to come and early adopters have grown accustomed to just getting better versions of last gen games.
Remember, this only applies to 1st-party exclusives. Games from Ubisoft, EA etc are under no forced mandate to make their games for the Xbox One or X.
I still say it's a smart move by MS business perspective, it makes sense for them business wise, it ensures no next gen multiplayer games will be lacking players, and it doesn't immediately devalue their old-gen console.
Taken from John Linneman Twitter page:
Cross-gen games were always developed as separate releases often from different teams and they were almost always horrible. Even still, it wasn’t the case that all first party games were cross-gen either! That’s what’s new here.— John Linneman (@dark1x) January 12, 2020
Personally, I don't think it's as much of an issue as he's making it seem to be, but I can see where he's coming from. Games like Titanfall had to cut back on what content they could work on because they had to keep in mind about the last-gen version, which that even had to get delayed by over a month.