One of the big issues with Windows 8 and Windows 8.1, is high resolution support, and DPI scaling. Well, it looks like Microsoft is listening to feedback, with Windows 9 reportedly supporting up to 8K displays, and improved DPI scaling.
PCportal has gotten its hands-on a build of Windows 9, with the image above showing off the new sizes for the Windows Explorer icon in Windows 9, with the image below showing the scaling for classic apps that can use the higher DPI. Higher resolution monitors are becoming the norm now, with 4K getting cheaper with every display released, and 5K even being teased.