Blueprints involving Customizer Development Team
Launchpad lets projects track the features they intend to implement over the next few releases. We call each feature proposal a "blueprint", and it can be a single paragraph placeholder for the idea, or a full-blown development specification. Once a blueprint is in Launchpad, we can generate reports of the project roadmap, as well as notifying interested developers of blueprint status changes. It's a great way to build a small community around an idea, feature or proposal.
This is also a good way to keep track of the features a particular person is interested in.
If you are interested in understanding the Blueprints tracker in more detail then you should take a look at the system documentation, where you can learn the best practices for effective community building and release management with Launchpad.