Originally Posted by karsten
No, it can't. RGB, as with all SDTV conections is limited by the resolution of the Television. Without using VGA or DVI (Which both transmit colour information seperately as RGB, albeit rather differently in DVI) you cannot get greater than 480/576 lines. Even if the saturn can run at 6 megapixels, you cannot possibly have more than 480 lines displayed, as that is all that the saturns encoder chip supports.
It also loses some quality over what is being internally processed - Excluding DVI, the RGB information is being transmitted via an analogue signal - so there must be a D->A conversion somewhere along the line, and everytime something is converted from D->A, or vice versa, some quality is lost.
RGB is mighty good quality, but a lot of stuff spoken about it is plain wrong. Yes it's the best quality many consoles can practically display, but in theory there are better solutions, which simply aren't implemented