This could be a superb camera for a run and gun shooter like myself. While I am totally in love with my GH3 and assorted m43 lenses, the benefits of having 24-200mm coupled with a 1" sensor, and 1080p video subsampled from 5K output could be immense. Depending on how well the footage can be matched with the GH3, and how the 'look' and dynamic range are, it could be very impressive, indeed. I'm really looking forward to Andrew Reid's comparisons between the RX10 and GH3.
Six long years ago, I went to China with my Canon G7, Fuji Natura Black and Casio Z750. I came back with some super photos, but missed the image quality of my Canon 30D. This is the kind of camera that would have been wonderful to have back then. Nowadays, my needs are very different, and I'd take a few cameras and lenses, but something like the RX10 could fit the spot if I was less demanding of image quality and shallow depth of field.