I dont think its clear at all how it will work.
Can I get my Bllodborne straight out of the box and play it at 4k 60fps/4k 30fps/1080p 60fps or will I have to wait for a developer patch?
If it depends on a patch that I have no idea when it will come, and if it will come, and my only advantage will be to play it at steady 30fps (since the original game suffers with it) then it will be a huge disappointment.
I still can't play GTA4 on Xbox One X at more than 720p 30fps because the developer/microsoft never released a patch...
Most games will be locked via code, DF already explored this. Not many games will have a magical 60 FPS boost, it is not a question of throwing better specs at it.