Yeah if Linux is going to try to do some of the stuff Windows can do, it needs to do it much better (i.e. sandboxing, privacy, ease of use). That's the only way you're going to get people to switch. It should also be easier on the developer side, which I think is probably not necessarily the case right now. I'm not sure how easy it is to develop a flatpak app or which programming languages you can use with it easily.