Future stereo over/under viewing should also support RightEye on top, because I would like to use the openKMQ prism glasses with a simple fixed distant mount to avoid using expensive stereo enabled displays or beamers.

A plus would be to extend the view to two LCD screens - for full res, full colour, full brightness previewing with these glasses. That's probaly easy because you might already support dual DVI output for stereo beamer projection.