Yeah it is a bit annoying to have some games 30 frames and other 60. A good selling point to me personally would be to disable some graphics features to achieve a higher frame rate if desired.
As lets face it 4k on any settings looks stunning either way.
Yup for me that would be a massive selling point for any console, don't even give the options for settings etc. just have 3 options where the developers have done the work for you:
30 fps and max graphics @4k
60 fps with lesser graphics @ 4k
60 fps with max graphics at 1080P



