But what really stands out about the phone is the large secondary display at the back that also surrounds the camera lenses, plus the visibly gapless design when the two halves are shut closed.

Source: https://www.digitaltrends.com/mobile/motorola-razr-40-ultra-leak-renders-foldable-phone-beautiful-images/

The foldable screen appears to have a droplet hinge design, which could potentially have a gapless mechanism.

Source: https://www.financialexpress.com/life/technology-google-io-2023-from-pixel-7a-pixel-fold-to-android-14-and-ai-search-top-announcements-on-our-wish-list-3081273/

Though Samsung did not change the tall and narrow form factor when the Z Fold 5 is closed, the Flex Hinge and the gapless design make it a bit more comfortable to use the cover display.

Source: https://www.digitaltrends.com/mobile/best-smartphones/