My component video cables arrived, so I got them hooked up last night and watched a little bit of LOTR:FOTR, swapping between watching through S-Video versus component video. The difference was incredible: far more significant than I thought it would be.
So now I get to be all pleased about my new television purchase all over again.
In other news, I'm going to put the fence up in the backyard in the next little while, so plans for ordering a bunch of lumber are proceeding, and I think I'll throw a couple of 4x8 sheets of MDF into the order, so that I can get started on some serious MAME cabinet building. Upright cabinet, here I come.