All basic parts of the workspace and plasma are working ok, i haven't tested KOffice.
As a desktop-environment this is not very good option. it can be used, but just running this environment takes 3/4 of the memory and it slows down everything. It's a nice playground and shows what this small tablet is able to run, but it cannot replace hildon-desktop in small tablet like n8x0.

Konqueror is way too heavy to use, you can load page or two, but then your tablet is jammed.

The developer who made this thing has been showing off everything cool like amarok etc.
http://www.kdedevelopers.org/blog/2892

This is slow, but can actually be used. KDE 4 in debian and in ubuntu are both too slow to use on tablet...