Usage share of web client operating systems. (Source: Median values from Usage share of operating systems for May 2010.)
Windows XP (50.50%)
Windows Vista (21.42%)
Windows 7 (14.22%)
Mac OS X (5.80%)
http://en.wikipedia.org/wiki/Linux#Mark ... and_uptake
I firmly believe that the insane amount of choice Linux offers is, on the whole, hurting its popularity and Linux would benefit from having fewer choices.
DistroWatch tracks over 300 distros alone!
Then multiply the insane amount of distros with each distro usually having multiple Desktop Environments to choose from.
The list of Linux desktop environments: AfterStep, Blackbox, Enlightenment, Equinox, Fluxbox, flwm, FVWM, GNOME, IceWM, ion, JWM, KDE, KDE Light, Looking Glass, LXDE, Metacity, Mezzo, Moblin, Openbox, PWM, WMaker, WMI, Xfce.
Some app categories are flooded with apps to choose from. Examples:
Music Players (alternatives to iTunes): aTunes, Amarok, Audacious, Banshee, Bmpx, Clementine, Decibel, Gnome Music Player, Gudyadequ, Exaile, Juk, Listen, Muine, Music Player Daemon, Quod Libet, Rhythmbox, Sonata, SongBird (now Lyrebird)
Video Editors (alternatives to MS MovieMaker): Avidemux, CineFX (Jashaka), Cinelerra, Kdenlive, Kino, LiVES, Open Movie Editor, OpenShot, PiTiVi, Vivia, VLMC
*** If you vote No, please give your thoughts as to why Linux, being free and and arguably better than Windows, isn't more popular.