It has nothing to do with anything political, it is a paid prop, plain and simple. Same with many other products.You guys don't get it. Hollywood is very "left" in their thinking and don't want to piss anybody off. Showing the underdog Mac is the PCD) thing to do and it's what they do best.
It's a neutral device.
Show something with HP, Lenovo or Dell on the lid and you open up a can of worms.