It's a statement that modern UI apps can't have the power, features of a full desktop app. Looks at what most of the Modern UI apps are, converted phone apps. Why would I want a Facebook app when I get a faster and better experience when I go directly to Facebook using the browser of my choice? Same with news apps. I get more content and a better experience by going directly to the site itself. Modern UI Mail over Outlook 2013? Even the little games have usually been ported over to a better app via a browser. And none of these apps belong to an enterprise market where surfing Facebook, news, playing games is not likely to be acceptable work time spent. There aren't enterprise apps in Microsoft store!