An interesting question. When the 12.9 inch iPad Pro, with its 2700x2000 screen came out, many developers gave their apps special, extended iPad Pro interfaces that showed more info. But now that the 9.7 inch iPad Pro, with its 2000x1500 screen is out, will those apps give the same extended iPad Pro interfaces to the 9.7 inch one too? After all, it is a "Pro" too, right? And if so, since the iPad Pro 9.7 inch and the iPad Air 2 has the same resolution, wouldn't/shouldn't those extended interfaces work on an iPad Air 2 as well? Or will these apps with extended interfaces only be for the 12.9 inch iPad Pro? iPads, iPad Pros, iPhone 6s, iPhone SE's, older iPhone models - all with differencing screen sizes, resolutions nd class designations. Developers can't be happy about all these little subtle differences between the models.