This is a relative question since alot of people are using Windows and the question might be in comparison to Windows features that the current Open Source tools doesn't have. One of the problems I think is inconsistency of systems (packaged in distributions), particularly in multimedia, where there's still a huge confusions, or too much options of multimedia systems to be used, (OSS, ALSA, V4L, V4L2, Gstreamer, Arts) I think there must be a default for it, or a way where a user select any of it and "just works" without him worrying about what system it is. My suggestion is to create a name for all of multiple options, like "Default", "Default Video System", "Default Audio System". etc, just to point out that the user doesn't need to worry about the system he/she is going to use. Here's my list of what's stil missing. - Audio/Video support for Instant Messanging in commonly used protocols (AOL/Aim, MSN, Yahoo!, etc.) - Hardware Properties configuraitions - Flashy introductions and tutorials (aka. Welcome Center) - Marketing!!!