Yes, these features are also coming to older GPUs too (I’ve popped the graph below to show you support all the way back to RTX 20 series), but you’re getting everything with the 50s.
An upgrade from the 4080 makes no sense, but as the owner of a 20 or 30 series card, the 5080 is an attractive option if you’re ready to fork over $999 for a graphics card. RTX 4070 Ti versus ...