Nice tidy collection. The picture makes it look like the sun shines directly on your dreamcasts, I suppose that could speed up yellowing of the plastic if that's what's going on, though I notice you have the blinds pulled down and your DCs currently look very white
The display shelf is right by a window. I took this pic the day I set up the display. I've since installed blinds and curtains to keep the sun off the plastic. Currently though, both dcs in the pic are hooked-up and in daily use. I picked up a clone ODE, a kaico hdmi adapter and the retro fighters striker gamepad. With the Atomiswave ports and the amazing homebrew scene, right now is an awesome time to be a dreamcast collector!