Looking back on using Linux as a desktop OS for almost 15 years we've
seen tons of features added but not much in terms of 'bite'.
Hardware support is a lot better but still sucks when it comes to
consumer multi-media, gaming performance etc.
Someone wrote down a well documented list on all this and more
http://linuxfonts.narod.ru/
why.linux.is.not.ready.for.the.desktop.current.html
Cheerio,
J.