Computerworld - https://www.computerworld.com/article/3244472/smartphones/dual-screen-clamshell-devices-will-kill-the-tablet.html#tk.rss_all
Phones have on-screen keyboards. Laptops have clamshell designs.
The next-generation enterprise mobile device will have both.
A dual-screen clamshell mobile device makes sense. Smartphone makers want to maximize screen real estate. This form factor doubles it to the size of a small tablet.
Tablet makers want portability. The dual-screen clamshell mobile enables a tablet to be folded in half and put into a pocket.
Above all, dual-screen clamshell mobiles are super flexible. They could potentially be used in eight different “modes”:
Phone mode. With the clamshell closed, hold it to your ear and talk on the phone. Laptop mode. Open the clamshell part