@Romullus, tiny off-topic, but true 32bit displacement maps would look smooth to eye (when looking at the texture itself) but the detail would actually still be there.
For example if the total depth of the map is 10cm let's say but it also has ultra rough micro-noise at 1mm, the map would still look super smooth to human eye.
It's not possible to judge detail of true disp map, it always looks blurry and smooth. You can though, high-pass it to reveal more&more micro detail or alter the ratio between low & high frequency detail.
Just thought I would say since you used screeenshot of the disp map as proof, but it doesn't work that way :- ).