When Apple launches the 20th-anniversary iPhone next year, it's expected to feature one of the biggest iPhone redesigns in years: an edge-to-edge display. But that wrapping screen may already be outdated by the time it debuts in 2027. According to a new report from the Korean publication ETNews , Apple already has plans for the next-generation version of its "four-edge bending" display, which could arrive in 2028. Per ETNews, the 20th anniversary iPhone will feature an OLED display that uses a magnesium-silver (MgAg) alloy. This configuration apparently features distortion and loss of brightness in the curved areas of the display. Allegedly, Apple is okay with this for the first iteration. However, in 2028, a new configuration featuring indium zinc oxide (IZO) instead of MgAg will be used. IZO is supposed to be more transparent, meaning it reduces distortion and brightness less, as well as heat issues.…