Wouldn't it be nice if you could install your app on any distro? In a secure, sandboxed way that allows you to keep running older apps mixed with apps that require newer libraries, and on newer distribution versions.
This is the goal of the Gnome SDK. It constists of a platform work to make sandboxed applications possible, a stable runtime that apps are deployed against, and a SDK that makes it easy to develop apps against that runtime.
Come and learn about the future of application deployment in gnome.
Alexander Larsson has worked at Red Hat the last 17 years, working on projects like Gnome, GVfs, Gtk+, and docker. Recently he has spent most of his time working on Flatpak.