I don't think that imperial measurements will be coming back. The generations that knew them (us and our parents) are dying out, and even those of us who are still well and truly alive are retired and don't have much clout any more regarding the goings on of the retail and manufacturing worlds.
Having said that, there may well be a market for niche shops and museums. Children enjoy seeing how people lived in "olden times" and it is educational for them to see what life was like only last century.
There are speciality shops here in Germany where you can pay in Deutschmarks and buy items that are no longer produced. Or so I've heard. (Might just be hearsay, can't find anything online, except that C and A still accept them. Especially in Eastern Germany where all aspects of life were completely bulldozed out by the Westernisation of the past three decades.
At the butcher's and greengrocers you can still ask for "ein Pfund" (500g) or "ein Viertel" (125g) it anything. I have also heard "ein Zentner" (50 kg) for a sack or potatoes. So the words still exist, although the metric values have been around for much longer, of course.
So much so that, once on a guided tour of a little German town, we were shown the markings on the church door which defined the local values for an ell (eine Elle), a foot (ein Fuss). Etc. One of the ladies in the group asked why they used such an odd measurement (1.41 m). She seriously couldn't understand that there had been a time when metres hadn't been invented yet.