InkCase i6 Second Screen
Some time ago a new smartphone surfaced. It was called the Yota Phone 2 and it has a very cool dual screen. Now, this functionality is (almost) available for your iPhone 6.
The inkCase i6 is a case including a 4.3 inch E ink display. It connects with you iPhone 6 via Bluetooth. This extra screen is specifically made for reading (better for the eyes than the normal screen) and functions also as a notification center. Oh, all you haters are thinking this thing will devour your battery life. According to the makers, it will not.