Can you show me a receiver that takes a VGA input?
No, but there are plenty of video processors that do, albeit they aren't cheap. I wonder how good the breakout box on that projector is?
Also, it's hard to tell whether a particular receiver will do upscaling properly. Some only do HDMI pass-through, some only will digitize analog inputs without actually scaling.
True. Frankly I do not understand the whole upscaling thing on mid-priced receivers. We've got DVD players that upscale, TVs that upscale, do we really need receivers that do it too? Anyone who's *that* serious about video processing buys an outboard video processor or a several thousand dollar A/V receiver.