Linux Needs Better Video Testing and Tools
If the top 10 Linux distros are serious about the desktop initiative, then one area I think they are not working anywhere near hard enough is in the area of video testing and tools.
Many people want to set up multiple screen Xinerama mode in a variety of ways. In fact, Linux should encourage that as way to say that it's easier to set up and better than Windows. Unfortunately, Xinerama mode is not so easy and requires hacking the XF86Config or xorg.conf files (depending on how old your distro is). When I have to start doing this to get the video working right, it scares off any Windows user looking over my shoulder. And I don't say that figuratively -- I really mean that this has happened to me 3 times.
They need to also not assume I'm using a dual head card. Instead, I'm using two separate video cards at my office because that's all I could get. And, likewise, they need to also assume two or more, different monitor sizes.
Moreover, when the video resolution or color depth is not ideal, but could stand to be experimented with, one should be able to use a GUI as well as text-based TUI (in case video knocks out during testing) to change this.
I have found that there's a GUI to configure this, but it doesn't work in my case of using Xinerama with two separate video cards.