For what it's worth, a former dev who has Xbox developer friends at Microsoft has said that the next gen versions of Halo have some game design differences from the Xbox One versions. Part of why the budget for the game is so expensive. I'm a bit skeptical of what next gen differences there could be for a launch game that's spent most of it's 5 years on current gen....but keep this in mind going into the show. Maybe something was lost in translation and it's all graphics...but he believes there are actual game design differences. Might be the Xbox Series versions do have differences in physics, AI, NPC count, etc.