In 2004, SED monitors would be available in late 2005.

In 2005, SED monitors were just around the corner; 2006, early 2007 at the latest.

Now even the SED manufacturers are saying 2008 at the earliest for commercial units.

Not that it's not an interesting technology with good potential, but there are some manufacturing issues (like maintaining a vacuum between two plates without external air pressure distoring the display in the middle).  It's one thing to have custom made high-precision demo models, it's another for cheap, reliable mass production.