There's a difference between color, and looks though. Personally, I bought my Halo: Reach console, because it was silver and I needed a new one.
I'll give you that.
I generally care aesthetics, but almost always consoles aren't sleek looking especially in the first batch. I mean can you say the 360 or the Wii look great? Sure the Slim looks better next to your tv in comparison to it's predecessor but is it a good looking device?
Hell I have a slim ps3, and I wouldn't say it looks like nice. It just looks...like a console
I've never looked at any console and went damn, that is something I definitely want to put my disk in. Computers? Phones? Cars? material possessions like that looks matter because we show them off way more than we do a console.