Apple's next "mid-range" iPhones could have a similar bezel-less front as the iPhone X in 2018, according to The Wall Street Journal.
Specifically, Apple is supposedly looking into an advanced type of LCD display called "Full Active LCD," made by Japan Display. You can actually get an idea of what Full Active LCDs look like by checking out the Essential Phone (below) and the Xiaomi Mix 2. One thing to note about phones that use Full Active LCDs is that, unlike phones with OLED displays like the iPhone X, they all have at least one larger bezel, usually on the bottom.
This type of LCD display would be less expensive and would most likely run into fewer supply issues than the OLED display used in the iPhone X, two factors that surely contribute to the iPhone X's higher cost. The iPhone 8 starts at $699, the iPhone 8 Plus starts at $799, and the iPhone X starts at $999.