I have already dealt with Nikon's latest version of a pocketable camera, the V1 and J1, which are not really pocketable because they have interchangeable lenses and as soon as you add one it's a bulky machine. They, of course used small sensors, much bigger than normal compact cameras but smaller than a 4/3rds sensor.
British Journal of Photography, but Dpreview.com have only published a preview so far. It will be worthwhile to see their full review and sample pics. As it stands, however, the G1x is being promoted as the ideal standby camera for professionals, one they need never be without, with useability and quality levels approaching a DSLR. If it proves itself, then I think a lot of stock photographers may put aside their DSLR kit in favour of the G1x, especially when travelling, because it will inevitably appear on the approved camera list at Alamy.
Quotes from a forum:
First, from a highly qualified reviewer: " It's better than 7D quality cropped to the same size (14 megapixels).
And the lens is better than any kit zoom, actually it's better than
certain L zooms - you can use it wide open at the wide end with more
confidence of corner-to-corner sharpness than a full frame user with a
24-70mm can hope for."
Second, from a very busy experienced professional: "from the few photos I took ,right off the top I could see the IQ is better than my Nikon D7000 with almost every lens I've used!"