Has this been covered from Ubisoft's website?
Xbox Series X | S: The near-future London of Watch Dogs: Legion will fully benefit from the hardware accelerated raytracing of the new Xbox Series X | S; from Piccadilly Circus and its giant digital screens, to Camden High Street’s neon lights and holograms, the power of real-time ray traced reflections brings a never seen before level of realism to an urban playground. Early collaboration between Microsoft and the game teams allows the game to unlock the power of Xbox DirectStorage, meaning loading times have been massively reduced allowing for smoother world traversal and faster loading times than ever before. Upgrade from an Xbox One X copy of the game to the Xbox Series X | S* version with Xbox’s Smart Delivery technology at no extra cost.
PlayStation 5: Ray tracing on PlayStation 5 will immerse players in a city full of digital screens, holograms, and neon lights, while players can also take advantage of the Tempest 3D Audio engine to bring London to life by hearing every passing car, talking pedestrian, or drone flying overhead. Thanks to the ultra-high speed SSD, loading times will be dramatically reduced, allowing for even quicker fast-travel and seamless high-speed drives across London. Adaptive triggers enable players to enjoy hand-tuned responses, elevating the visceral feeling of high-tension moments. And lastly, you can upgrade your PlayStation 4 copy of the game to the PlayStation 5** version at no additional cost.
edit to include the link
Ubisoft On the Next Generation of Consoles – Get the Details
news.ubisoft.com