Agree. 60fps should take priority over 4k. I didn't have budget to get expensive 4k tv recently, so i settled for cheap but quality 1080 instead.
You better buy PC monitor with 1080p and 120hz refresh rate for next gen if you planned to buy either of two, because i bet they will allow us to choose between performance (choosing frame rates over resolution) like with PS4 pro and Xbox One X. And PS5/Scarlet will have 120 fps capability with HDMI 2.1 and freesync. It's more cheaper especially Freesync Monitor.