[S4B]

It would appear so.

[Yudster]

I'm quite pleased I missed it, whatever it was.

[Vivienne]

I think it's because a black screen uses less energy than a white screen. This is was 'revolutionary initiative' at my work last summer to save energy, and I worked for an energy company.

I believe google were saying it made no difference : black or white. I think the black was just to get people curious to find out why it looked like that.