Mobile apps are designed to be used on mobiles. But what about web apps? You need many versions of the app, from smart-watches to desktop monitors and smart TV's. And then they will be crippled by the web chrome/shell, so we are stuck with Electron/NW.js apps if you want it to blend in to the OS. What's nice with web apps though is that they are sand-boxed, compared to Electron/NW.js apps that get full system access. What needs to be done is to give better design/layout possibilities for web apps once they are installed on the "shelf/desktop", for example transparency, able to design the top bar, able to have a window menu. Or maybe the future is UI toolkits like Flutter and React Native ?