Short bio: Computer Scientist, FOSS supporter (read more)
Tux Machines (TM)-specific
DVD tools are more important on Linux than on most operating systems. While Windows or OSX users rarely burn CDs or DVDs except for an occasional backup, for many Linux users, burning a Live CD to investigate a distribution is a common task.
Similarly, although the users of other operating systems may extract audio or visuals from a CD, all the really large local content libraries I have seen tend to be on Linux. What is an occasional convenience to others are standard tools in the free and open source lifestyle.
For this reason, DVD tools are well-represented in both KDE and GNOME. On both desktops, earlier tools like X-CD-Roast that are formidable in their options have been replaced with more user-friendly default tools: K3b for KDE, and Brasero for burning and Sound Juicer for audio ripping for GNOME.
All these tools perform their basic tasks well enough for most users. However, what is striking is how clearly each of them demonstrates the design philosophies of the desktops with which they are associated.