As CNET points out, it looks like a Z or taco holder at the end. You can also fold all the screens so that you have a form factor that looks more like our usual phones, except that it’s a thick stack of screens.
It’s great to see companies experimenting with new form factors. However, do not expect that this phone will be available soon. There is no name, no scheduled release date, or no work screen. When these things collapse, the triple phone will face challenges faced by dual telephones, especially how the display can be protected by repeatedly folding the device.