[jeffmk]

True in general but I disagree on specifics and magnitude. While those -- and other factors, such as exposure -- are limiting factors, and very important, THE primary limiting factor, for me -- who has used multiple dSLRs, POSes, and Androids- and iPhones-as-cameras -- and I suspect many others, has been one thing: time-to-capture.

The time it takes between me pressing the shutter button until the camera records the shot as usable data -- this is the important factor. This is what is holding phones back. On phones, I have to wait sometimes up to 0.25-0.5 seconds or even infuriatingly more between the time when I tap the software "capture" reticle and it records the image. This is what is unacceptable in modern phone cameras. By that time the cat has moved, the play is over, my hand has shaken.

On dSLRs this is refreshingly fast. I half-press to focus, complete-press and now I have the image, nearly instantly from a human perception of time, even given the mechanical slowness of the mirror movement. I know the limiting factor is for all practical purposes my own reflexes. For the phone, I know it's crap hardware/software.

[tspike]

On the flipside, the phone is what you always have with you, in a given moment, and reaching for a device in your pocket is much faster than going back to the car to dig through your camera bag for your massive SLR. I say this as someone who has used and loved SLRs since the film days. I'd love to see the time to capture on the phone approach that satisfying threshold you mention on SLRs, because they already help me capture so many moments I'd otherwise miss.