Any AES application authors here who can speak their thoughts?
I think it's a nice feature but it would be "nice to have" also for normal GEM apps. E.g. "floating windows" would allow applications to open many panels like in Photoshop. To make sure normal apps don't abuse this feature: the "floating windows" of system applications are always visible, but "floating windows" of normal apps are automatically hidden when the app is not active/"on top".
Next question: how does the system know if an application should be considered a "system application"? If the application registers itsself as part of the "system" (by issuing a special AES command), every normal GEM application can register itsself and abusing the feature is still possible. So the AES has to know in advance which apps are "system applications" (e.g. defined in the configuration file).
Philipp