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

Will an LCD with a higher pixel density handle lower resolutions outside of its native one better than one with a lower pixel density? The reason I'm asking this is because I'm trying to decide ...

Most modern computer monitors, and even televisions, have an edge-lit LCD display that’s fundamentally similar to the first such displays sold decades ago, but that’s not where the future is headed.