No most androids are not getting rid of the lights seeing as the flagship android phone nexus 4 uses them and are highly customize-able as the nexus lights are full rgb and can display almost any color. And saying they cannot be useful is plain ignorant. There are plenty of situations were they are useful. For example, I take a shower and have my phone in another room so I cannot physically hear any notification from my phone. I leave the shower and from my color set up I can see if I have a missed call, email, text, Facebook message etc without even physically going to my phone. If I see no flashing light there is no reason to even approach my phone. It also almost "forces" me to check my phone. If there was no light and that same situation happened were I left the shower, I probably wouldn't even pay attention to the phone and probably view a message late. A flashing light just makes me check the phone.
So basically its particularly useful when you leave your phone for some amount of time, either going to the bathroom, gym or physical sport were you place your phone away etc.