[mike]

Good question. I've wondered the same thing. My thinking is each consecutive generation of sensors would have new tricks for an overall IQ gain. Even if lenses are the limiting factor in resolution or the resolution stayed the same. Though, there are reasons for more pixels beyond just increased resolution.

What's there to fear? I think it's great that if you have a niche where your camera works as good an anything new, that's fantastic. It's also great someone else might have the same need and be happy with a used camera.