Technology, much like time, is an inevitable march in one direction. At least, it is unless we use technology to destroy our ability to create technology, but that is a whole other discussion. Similar to technology, from time to time Apple will change the minimum requirements for applications that are submitted to the App Store.
Starting in July 2018, Apple will be making a couple of things requirements. The first is that you have to use the iOS 11 SDK for all new applications as well as any updates. This does not mean that you cannot support older operating systems, but you must support iOS 11.
The second requirement is that any new applications, as well as any updates, must support the iPhone X’s Super Retina display. This means that you have to have graphics that are 3x resolution, as well as icons that are 3x.
These requirements are not only for iPhone only applications, but also apply to universal applications as well. Luckily for me, my apps already follow these guidelines. This is because I want my apps to work on all of the modern devices.
What this signifies, to me at least, is that there will be more Super Retina screened devices in the future.