According to the patent patented by IBM, it is a smartwatch, but it is a miniature smartwatch with a larger screen as needed. However, it is an 8-folder type. Something that can be folded eight times. It contains the concept of expanding the screen from the size of a smartphone to the size of a tablet.
It is quite attractive that the watch screen on the wrist becomes large, but having to fold and unfold eight times can cause problems to be realized realistically, such as durability or thickness when folded. Of course, this is not actually an idea to the last, but an idea applied for a patent. Related information can be found here .