The diversity of Linux distributions is one of its strengths, but it can also be challenging for app and game development. Where do we need more standards? For example, package management, graphics APIs, or other aspects of the ecosystem? Would such increased standards encourage broader adoption of the Linux ecosystem by developers?
Flatpak with more improvements to size and sandboxing could be accepted as the standard packaging format in a few years. I think sandboxing is a very important factor as Linux distros become more popular.