a large number of questions...

remote desktop has been used to configure things. but needs to be completely turned off before any serious work is done.

remote desktop is NOT orientated to providing any kindof of realtime video performance - and its use as a preview destroys the entire purpose of this application.

there is NO software application that can be written to do this.
as getting a softwarepreview from the graphics card right now is a very performance intensive thing for the computer to do.

using remote desktop will destroy playback performance.

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in a future version 4 outputs may or may not be possible, or might have a serious performance penalty that makes it unusable.

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using a hardware device to provide a remote preview is the best thing to do.
It may not seem like it - but it is.
the ethernet bandwidth requirements to get 1024x768 images onto ethernet at 30fps are very large.
if compressed, then the computer is hosed by doing compression.