I don’t know if this has been brought up before, but I had an idea for the Haiku dock, err, Deskbar.
In current builds, when an application loads, there is no visual feedback to the user that indicates the application loading. Especially when a large application loads or the user loads multiple applications simultaneously it can give the impression nothing happens. In which case the user tries to start the application for a second time.
Haiku could use the application title-bar in the Deskbar to give the user feedback of the loading process.This can be implemented in the various possible appearances of the Deskbar.
This way an application loading indicator (in a splashdialog) is not necessary and a consistent user experience is achieved.
In addition, one can also include progress indicators in the individual window titles in the Deskbar when the application expander is used, so the user has an up-to-date overview of the tasks running in windows of applications that are hidden or in another workspace.