Blow Up Projector Screens Why Is It That When You Blow Up A Movie Onto A TV Using DVI Or Supervideo Out, It Doesnt Get That Distorted...

Why is it that when you blow up a movie onto a TV using DVI or supervideo out, it doesnt get that distorted... - blow up projector screens

But if I pull on my laptop full screen, which seems to have the same level of distortion. Basically my question is how to do things a projector so big with so little additional distortion. This is particularly remarkable when you seem to have a computer screen with a projector, a video on the same level of distortion.