Flush-mounted pop-out electrical outlets

Since it would appear we're stuck with cords and cables for the foreseeable future, how much more elegant would life be if unused sockets were pretty much invisible unless required?

From The Green Head: "If you find that traditional power outlets aren't all that interesting to look at and the temptation to stick your fingers into them is simply too great, then check out these cool new Legrand Adorne Pop-Out Outlets. When you're finished using them, simply push and they disappear back into the wall."

From $39.98.