Some say if you play certain Xbox360 games like PGR3 on Dell widescreen lcd monitors (using the VGA cable), the graphics are TOO sharp and resulted in pixellated picture. Is this true?

Man, and I thought playing PS2 on Dell lcds using the available composite or S-video or Component connections would look pixellated, let alone using a high-res VGA Cable on Xbox360? Perhaps my earlier investment on Dell 20" widescreen monitor is a waste then?