Red Hat‘s recent changes on the desktop platform are pretty interesting. If you are interested in Linux, or OS concepts in general, take a look at the Fedora Project. Fedora is focused on the total solution : core OS + packages. High on my wishlist is an update notification and installation for all packages on my machine, combining concepts from Red Hat Network and Ximian‘s Red Carpet. Centralized updates in exchange for something either from the vendor or from my pocket.