HannsG HU193 18.5″ LED monitor is showcased at IFA 2011 in Berlin until the 7th of September. This monitor can be powered by 2 USB 2.0 connectors or just 1 USB 3.0 connector as it consumes less than 1 Watt thanks to white LED backlight technology. The native resolution is 1366×768 and it should be available by Q2 2012 for around 149 Euros.
Once you connect this monitor to your computer or laptop, the driver (DisplayLink) is automatically installed into your computer. The latest version of the driver for Windows is DisplayLink USB Graphics Windows Driver 5.6 M1. This driver is also available for MAC. A compatible open source driver called libdlo is also available for Linux.The latest working version is Libdlo 0.1.2 and the latest development version can be clones from git with one of the repository listed at http://cgit.freedesktop.org/libdlo/ , e.g. git://anongit.freedesktop.org/libdlo. However, the project does not seem active right now since the latest commit was done in August 2009 and only Ubuntu 9.10 is supported.
You can watch the interview and demo of the display at IFA 2011 (filmed by Charbax)