They were doing this story about TV screens a few years back. If anything PC parts are using less power than a few years ago because the industry is already self-aware that the power requirements were getting out of hand.
The only people guilty of using a lot of power are the people with dual or triple high end cards and this is a minority or users.
If you want to moan on about unnecessary power use in home electronics, how about getting people to sit closer the TV instead of having an 80 or 90inch one.
NB: I went from a GTX460 to a GTX970 and the power (measured at socket) was almost the same