The Verge reports that Samsung Display showed off a new folding screen at the Consumer Electronics Show (CES) and said that there was no visible crease.
A photo displayed by the company, shown at the top of the piece, looks extremely impressive. Even studying the full-size photo very closely, I can't see any sign of a crease. Indeed, if I hadn't known it was a folding display, I would never have guessed.
Another photo shows the Galaxy Z Fold 7 display on the left, with a visible crease down the centre, and the prototype display on the right. The difference between the two is night and day.