Although the iPhone 8 hasn't officially appeared on the market yet, the first information about its successor, iPhone 9, has already appeared on the Internet.
iPhone 9 will be released in 2018 and Apple plans to release it in two variants. First one will have smaller, 5,28-inch display, and second one will have 6,46-inch display. Screens in both variants will be made in OLED technology, and probably Apple will decide to buy them from Samsung. We haven't received more information so far, but it's not surprising because many of the company's plans for this phone may change until beginning of 2018.