I didn't state my point very well about "we're there" in megapixels. In the olden days of film, when I was a Leica shooter (sold in 2002), the limit to image resolution was (typically)the resolution of the film. The film that photographers used, as opposed to specialty films, was about that of the D600 sensor. That may have changed in recent years, but somewhere around 20 Mpx approximates fine grain film resolution. That was my point- that this resolution (16-24 Mpx) is now normal. I have a photo I made with a 16 Mpx Lumix camera and a Leica lens. It is hanging in my bedroom. It measures 5'4" x 3'4", and is visually sharp from 24" viewing distance. We're there.