Launchpad still has a couple of very nice features you do not see at e.g. Github, in particular for desktop-oriented software:

- Built-in translation support; there's a big community that can (and, in my experience, will!) help you translate your project's .pot files using Launchpad's interface. It also has auto-import and -export of files from the source repository.

- Build recipes; this allows you to build .deb packages for your project, and to put them in a PPA which makes them easily testable for Ubuntu users.

- Detailed progress tracking functionality; using releases, milestones, a nice bug tracker & blueprints.

While I've in the past used Bazaar in conjunction with Launchpad, I'm happy to see them make the switch to Git. With its larger development community and popularity, it's a natural choice. Just a shame it isn't as well integrated yet.