Not sure if it does or not, but I have a $100 power cable going to mine just to make sure...
Placebo is very powerful.
But I do know for a fact cables can make a difference. Have done a lot of double blind tests on analog and digital interconnects, as well as speaker cables.
But... all my testing was done with high end two channel audio.
I don't think we are as perceptive to video changes then we are to audio changes though.
With music only, you are only really engaging one of your senses, with Video you are engaging at least two.
And the more stimulated your senses are the less you notice differences.
Example: When I watch a 3D movie I can't concentrate as much on how "great" the sound is compared to when I watch the same movie in 2D.
Human limitations I guess.
Very easy for anyone to test what I am talking about. Close your eyes during a movie and you'll quickly notice how much more perceptive your hearing is of the source material.
Cloverfield sounds Amazing with your eyes closed.
To anyone on the forum that has the money and space for a high end two channel setup, you should do it. It can be some of the most emotional and amazing experiences you have in your life.
Turn off the lights and let the emotion of the music consume you.
I miss having a high end two channel setup, but will figure out a way to get the space for one again within my life time.