LG is crafting big foldable OLED displays for use in future HP and Apple devices. The 17" HP laptop screen folds into an 11-incher and sports 4K resolution as well as touch and stylus input support. LG will start its mass production in the third quarter.
https://www.notebookcheck.net/LG-working-on-foldable-Apple-MacBook-OLED-screens-to-supply-HP-with-17-4K-laptop-display-that-folds-into-an-11-incher.611251.0.html
I would like to see a 18" OLED that fold-out into a 21:9 / 22"+ ultrawide.
Portable enough to carry and offering a uniquely large screen real estate for both productivity and media consumption.