PWA to get Add To Homescreen functionality on phones and make zites look more like Apps

Just an idea, not sure how possible it is:

Also, I know that you can already add sites to your homescreen. But making it a PWA will remove the address bar, put them into seperate windows, and add a splash screen. I also think I read somewhere that they will also be put into the App Drawer in the future.

This would require Service Worker support also, I believe.