hmm, thats a difficult to anwer question.
our footage is 320x240px.
we are trying to connect all output devics via vga cabling, and the output is surprisingly good and you do not see any pixels (if you use metaimage or filmstrip you will see pixles, but also difficult to see)
On friday we had a gig with a LCD beamer again, the output was jerky.
But if we use our own 600EUR DLP beamers, you have a very fine, nothing to worry about, image.
i think the video equipment and output signals you use have a immense impact on the output quality - thats what it looks like from my 4 years of VJing side of view
[Edited on 4-4-2005 by asbach]