There are important differences between the various fly-by-wire (FBW) systems that must be discussed. Here are some thoughts, mostly to help spark debate (its getting a bit dull in pprune-land!)
1) FBW is not worth much if all you do is have a computer drive your controls. Control tubes work just fine, and only in truly large sized helos is FBW lighter or simpler.
2) Most FBW systems are just translations of conventional controls into FBW without changing the basic control scheme. That means the aircraft is basically the same as it was, albeit a bit more stable. The pilot still moves attitude to make the machine do its tricks, just like Igor did. Big whoop. That is how NH-90 works, and it is not worth it (in fact, the first 90's flew with iron control tubes, thank you very much!)
3) Given a computer and modern sensors, it is possible for the controls to be radically altered, so that the pilot does less juggling, and the control system does more. Imagine a car that has lane sensors that see the stripes on the road, and motion sensors that see other cars. You could do much to stop auto accidents if you use that system as a stating point for a new way to control cars. Same with helos. The concept of having a pilot juggle an eletric stick in a FBW to do what he has done is old fashioned, and wrong. Take the controls to a new level.
4) A velocity stabilized control system, where the pilot choses ground speed and the controls deliver, it is entirely possible. This system could allow flight in pitch black, zero horizon situations, or in complete white-out/Brown-out. It would have an auto-hover capability, like SAR doppler hover, but fully integrated into the electric stick, so the pilot merely asks for a ground speed, and it delivers. The pilot does not need to juggle pitch and roll attitude, the controls do that. He does not have to walk the pedals, the controls do that too. I have flown this system for several thousand hours in sims, and dozens of hours in helos, and it works wonderfully.
5) The weapons can point the aircraft, so the targeting accuracy and time to shoot drop to half that when the pilot is unaided.
That is Fly by Wire. Comanche had it, and so will the H-92. Nothing else comes close.