In terms of design and usability Apple these days seems to be doing all the catching up. Remember how Apple was against making bigger phones but Samsung changed the trend and then Apple had to follow suit? Many features in iPhone 8 (or iPhone 7S), as listed on this Mac Rumors blog post, are already there in many Android smartphones.
The next iPhone will be coming with a 5.5-inch OLED screen. The lesser model will carry the traditional LCD display. But more significant is, iPhone 8 will be coming with the now-famous curved screen that was introduced in Galaxy S7 Edge. It is touted as the best smartphone display on the market.
According to the above link:
“The OLED version of the new iPhone will all be curved as Apple ordered all plastic OLED — not glass — from Samsung Display. Samsung is capable of supplying a little less than 100 million units of curved OLED displays to Apple,” a source familiar with the matter told The Korea Herald.
Apple will be getting its OLED curved display from Samsung. Even LG and Sharp can supply the same sort of displays but these companies won’t be able to meet the demand, at least till the end of 2017. Although on an average Apple sells 200 million iPhones in a year, Samsung can supply around 70-100 million screens to Apple.
Other speculated changes are that iPhone 8 will be coming in a glass body with a missing physical Home button. It will have an edge-to-edge display with near-zero bezel. The touch ID fingerprint sensor and the camera will be embedded into the screen. Another significant change will be wireless charging.