Upscaling, Lots of issues still. Doesn't look great in Forza horizon 6.
They look "fine" in still images,
IN MOTION, because horizon6 has alot of repetitive patterned structures like nets/fence/posts along the road and vertical window mesh for the cities, Upscaling adds alot of noise, and stability breakup. Everything looks a little sandy, especially along/around specular high contrast edges where the shimmer goes bzzzzzzz
Raytracing cost is still no bueno. If you use normal pipe, 4K maxed out at 90-130fps, Ray tracing, 1080p upscaled, 90-100fps. Cost structure still isn't there to support it.