Are we going to be getting a new Xbox every 3 to 4 years now? It could be that a new model in the Series X will be out in 2023 and then Xbox One is dropped so that next-gen games don't arrive until then.
higher power is unlikely to result in many genuinely new ideas that wouldn't have been possible with current hardware
Well, how many games have NPCs in high numbers like AC:U or Hitman, but more developed, each unique, with its own daily schedule? How many games have complex worlds and gameplay, advanced large scale physics?
Not sure about that at all. Wouldn't the ability to run unsigned code potentially expose the system to all kinds of shenanigans?