Dead pixels were the bane of every screen owner's existence. Now they've vanished without a trace. What changed?

I bought a new LCD TV today. When the screen is black, I can see one bright white pixel right in the centre. I ran a "dead pixel scanner" program which cycles through various colours, and the ...

I've had this notebook for about 3 months and after about a month i notice a tiny green pixel in the middle of the screen that won't ever go away no matter what regardless of what programs are ...