Samsung is slated to launch the next generations of the Z Fold and Z Flip flagship lines in the second half of 2021. However, the OEM is now said to have an even more interesting foldable in the works for the next year after that. This "Galaxy Z Fold Tab" might be capable of bending at two points and, thus, have the scope for more modes compared to its predecessors.
https://www.notebookcheck.net/Samsung-will-launch-its-first-gen-tri-folding-tablet-in-2022.532935.0.html
Not sure what to think of many of these recent "rumors". I see a (bi)-fold devices with (3) sections, BUT the rumors are suggesting a "tri-fold" design. a 3-fold design assumes there are (3) hinges & 4 sections to the device.
right now, Samsung could be working on a multitude of concept designs. But seeing how well the Z-Fold-2 works, I don't doubt they have a large (15" or 17") concept version testing in labs now.
The only real CON is overall device weight. The Z-Fold-2 feels like it 2x as heavy as the Note 20-Ultra.