Alright it seem there's a definite advantage in running native 480p games through HDMI in 480p without an external scaler For my HDTV. My TV has some damn good internal scaling. I guess that's what happens when 70% of its processing is dedicated to picture.
As much as I like the WiiU's upscaling my ST60 has fewer or no artifacts by comparison.
Do televisions treat 480p scaling via HDMI differently than they do with component sources? Just curious, I thought the scaling algorithm was determined by source resolution rather than input type