Originally Posted By: peter
You can do that today with Displaylink USB video gear. It has to cheat a little bit (reducing the quality) if the external displays get full-screen updates every frame (gaming, video) but for productivity applications (and for coding) it works really well.

Oh yeah, forgot about these. I used the eVGA adaptor at my old job to have a second 1280x1024 monitor hooked into a Mac Mini with just one display out. I specifically picked a Displaylink model over the others due to the proper Mac driver support.

And interesting, looks like Displaylink devices are a popular addition to support Windows Multipoint Server. Didn't even know that existed till now. Someone here was looking for this exact solution...