This is one of the important unreported changes that Windows 10 latest Build 9860, which has started rolling-out yesterday, brings with itself.
One of my Netbooks, which has the Windows 10 Tech Preview running, has 1024×600 display resolution and it was neither able to open the Windows store nor any other modern apps, until the latest update. As you can see, the message still persists, but now I can open the store and even install the apps.
