Samsung Foldable OLED Display

Samsung is showing off a concept phone with has a folding OLED display at the FPD International show in Japan. When unfolded, the display is about 5-inches, which is huge. There is no physical keypad on the phone, which might suggest that the foldable display is touch-sensitive, though they might have just created this phone for demo purposes and omitted the keyboard. Are foldable OLED displays the future of mobile phone displays? It certainly looks like an interesting technology.