ah yes - i just found a site that explained how snes games and so on are 50hz (bordered) - but turbografx ones are not. Shame the emulator is blurring things a bit though...
I friend has a wii hooked up to a samsung telly with component cables, and even thats a bit blurry - looks like the image is being forcibly upscaled to the higher full res of the telly. pixels are not sharp like when you use scart rgb on a normal crt telly.