Engadget has a hands-on here: Sony DSC-QX100 and QX10 lens cameras bring top-notch optics to any smartphone or tablet, we go hands-on (video)
I love the idea of this, though I’d never buy one (far too expensive for the “neat toy” category that it would fall into for me).
Well, as far as I can tell it connects to the phone via wifi, so it doesn’t technically have to be attached to the phone in order to work. Meaning you could place it somewhere, and control it remotely using your phone - limited only by the wifi signal strength, I guess. Which is probably available in other cameras (I have a feeling there are high end DSLRs that allow remote control via smartphone apps), but not sure how widely available it is in cameras in this price range.
