Windows RT is fat -- so what?

I don't get it. I'm seeing breathless headlines all over the ether about the way Surface RT tablets only have half the advertised space available for consumers' use. If you buy a 32GB Surface RT, there's only 16GB available to store your stuff.

Source: http://akamai.infoworld.com/t/microsoft-windows/so-windows-rt-fat-so-what-206523?source=rss_infoworld_top_stories_

AMERICA MOVIL AMKOR TECHNOLOGY AMPHENOL ANIXTER INTERNATIONAL APPLE COMPUTER