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Halo 5: Guardians recently received an
Xbox One X upgrade which increased the resolution to native 4K. The game now runs at 4K 60 FPS with dynamic scaling. However, what about future Halo games? Will they also achieve 4K 60 FPS visuals? From a job listing on Microsoft's Careers page, it seems so."
https://www.windowscentral.com/343-industries-hiring-artists-future-4k-60-fps-halo-game