I don't know about RedHat specifically, but I can take a guess extrapolating from the kinds of "desktop" customers Sun had. Not desktops in the ordinary joe sense, but desktops in the "platform to deliver a limited set of applications reliably/consistently" sense. Think stock-brokers / trading workstations, banking, etc, where for whatever reason a desktop interface is still preferable to a custom, restricted "kiosk" interface.