Samsung Display is reportedly working on dual foldable screens with versions measuring 8" and 13". The panels are expected to be ready this year, but its unclear when the first devices to use them will appear.
According to Korean publication The Bell, two different designs are being developed G-type and S-type. The letters are meant to illustrate the shape, but pictures should make it more clear:
By the sound of it, the 8 display will be a G-type and the 13 an S-type. They will compete with the likes of iPad mini and iPad Pro, respectively, which have similar-sized screens.
The G-type screen will leave an active display on the back when folded, while the S-type will only have a display on the front.
Objectively the fold has the edge
There's basically no competition in that segment. Waste of time comparison since it's such early days. People will get the one they want but they're all going to be eating dust in a year or two's time when the designs that have worked out the problem...