Linux distros have had the run all your software from the 'app store' concept before Mac and Windows. The only difference is that Linux distros assume that all

Linux distros have had the run all your software from the 'app store' concept before Mac and Windows. The only difference is that Linux distros assume that all their users are more computer literate and know what they are doing when they install third party binaries. If you are writing a general purpose, mass market consumer OS, you want to clearly indicate to your user when they are doing something risky.