It's my understanding (and from watching the videos that I can get as a civilian) that the Russians still aren't operating their helicopters in a manner that I would be comfortable with if I was inside one. I certainly wouldn't be pumped flying in the environment they are in, with so many MANPADS out there, but there is no way a machine I was in would be hit with an anti-tank missile while we hovered (as was in the article.)
Lot of preamble to say: no, I don't think the attack helicopter is dead. Attack helicopters are nimble and can hide in terrain quite well, and even when an attacking force can see them it takes a skilled operator to actually hit them. The single use drones that operate like kamikaze vehicles may throw a winkle into the mix, but a helo flying at 150knots is going to be very challenging to hit for one of those. I expect there will be quite an arms race countering and then counter countering these in the future wars.