It could have been so simple: the display on a roll with a spring and a sensor to keep track and rescale the resolution accordingly. You pull at the top to extend the display to x2 and more and be done. Maybe add a scissor at the back to keep the foil without wrinkles. It would have been old-Lenovo-style sturdy instead of the plaything with a motor that breaks after 2 years.
It could have been so simple: the display on a roll with a spring and a sensor to keep track and rescale the resolution accordingly. You pull at the top to extend the display to x2 and more and be done. Maybe add a scissor at the back to keep the foil without wrinkles. It would have been old-Lenovo-style sturdy instead of the plaything with a motor that breaks after 2 years.