On Sun, 2009-03-22 at 23:20 -0700, David Griffith wrote:
  I suppose it wouldn't be that different from
currently-available laser
 light shows.  It would make playing old vector arcade games much more
 interesting. 
That would be LaserMAME, which is (was, I don't know) a port of MAME
that drove a Pangolin card to control a laser spiro.
Gordon