I want such things to exist, but I am not sure how they are controlled. The emphasis is on my lack of knowledge, not lack of tooling. Many of them are rapidly iterating and docs are so-so, despite xdg-app (nee Flatpack) being around for a while. This one is a reincarnation, if memory serves.
http://flatpak.org/ (They refer to xdg-app IRC and ML addresses)
So this is my main concern.
It is amazing most system administrators equate formal installation and ability to execute as 1:1 on Windows,OSX, and Unix environments. In most cases, I can extract executables from MSIs and use them from an admin install. Only more experienced people pick up on this (believe me, I am still new to this and it was years of sysadmining with skilled people to have this click in my mind when I started).
So why do I care? Software Restriction Policies and AppLocker and such are a pain. Executable signing and the infrastructure around it in OS X are a pain, and MAC systems in Linux are a pain. This brings real benefits to users, local non-privileged app installs on these systems, and these mitigation countermeasures mean more work for sys-admins, many who will never know in distros like Ubuntu it is on by default with kiosk machines.
Some of us developed Linux only kiosk machines for a reason: I could whittle that attack surface down real nice. Sadly, on every system that gets attention, it's a battle we lose, to get philosophical.
As a