"Digital SLRs with full-frame 35mm (44 mm diagonal) sensors are the cameras of choice for professionals and serious amateurs who can afford them. The best of them-- the Canon EOS-1Ds Mark II-- has image quality comparable to medium format film (645). The recently-announced EOS 5D comes close, and it is smaller, lighter, and less expensive. The number of pixels in full frame cameras will slowly increase, topping out around 24 megapixels. There would be little benefit from more pixels: resolution would be limited by the lens, and noise, dynamic range, and yield would deteriorate."
He also wrote:
"Fantasy 4: X3 sensor, same spacing as the D60, filling a 24x36mm frame.
4864x3242 (15.8MP)
resolution relative to 35mm film: 1.58
Performance may surpass medium format [film] if such a sensor could be built."
And you call the fp "low resolution"....