I will say though, despite only 1GB being for games, I assume that will increase as time goes by. Just like the other console makers did, they will refine the OS and reduce it's footprint. Seeing as the OS on the xbox only uses 32MB of RAM I don't see why they would need a full gigabyte. Maybe for the browser and other features?
http://en.wikipedia.org/wiki/Xbox_360_system_software
Also, comparing it to a desktop? You know that's a futile endeavour, the PS3 had less RAM than my desktop from 2003-2005. (forget exactly when I had it).
Also, the US price is out.
http://vgtoday.net/2012/09/us-and-european-wii-u-launch-details-revealed/#.UFIHfFFiR0Q
Basic packs will consist of a white 8GB Wii U console, GamePad, HDMI cable, sensor bar and two AC adaptors, costing $299.99.
Premium packs will be made up of a 32GB black console, GamePad and charging cradle, HDMI cable, sensor bar, stands for both console and GamePad, and a copy of Nintendo Land, all for $349.99.
So much for your laughable figure of $400.
I've also heard that the 2 models in the Uk will be £210 and £250 according to retailers. I have no link as I was told in person by a guy who writes for a gaming website.