| I still maintain that the best way to make APT accessible to new users is to make interfaces that work with both APT and local files. That’s the thing that I have to explain to people whenever I set up Debian for them.
“Well, see, if you want to install a package, you use apt-get. But if you want to install a package file, you use dpkg. No, there’s no difference, they’re both Debian packages.”
While I think Deity, Aptitude, and Gnome APT (which I hear has a maintainer again) definitely have a possibility to evolve into something like this, IMO a prerequisite for any packaging tool to be user-friendly is consistency, which means the user can install packages from APT, local files, or URLs in the same program. That would be a much better first step towards helping new Debian users than popups.