Haven't you all seen the little dooky that clips to your glasses and sits
about 3 inches in front? Its a commercial product "around" $100 and uses a
linear arrary of LEDs and a rotating mirror to give a full SVGA display
that seems to "float" about 8 inches in front of you. Last time I saw them
at WCES they were working on a high definition TV eyepiece, and the quality
was very good.