just fired up pardus 2011.1, put a dvd in the player, and from the pop-up menu i could choose smplayer.
it showed the dvds menu and started playing when i clicked on the start option.
don't know for sure if i have any extra codecs installed, though...
if the base, i.c. mandriva, is no longer reliable, i fear all derivatives will suffer from that too.
personally i wouldn't mind a commercial open source os as an antithesis to the closed source variants. one would pay more or less the same, but wouldn't have to suffer from all kinds of weird licensees and stupid restrictions.
so, the choice would be: closed windows, them apples or a penguin. choose one whilst buying a computer.
another thing that would be good imho, is that such an os would come in two flavours:
1. enterprise, emphasizing on stability, security, durability, lts, and functionality. a highly customizable, build up (technical) system.
2. home or multimedia, also customizable, but emphasizing on usability, or ease of use, by default with all kinds of neat apps and codecs installed.
next to such a basic penguin one could, and should, keep developing all kinds of variants, because that's evolution for you too