Overall, the G10 offers an excellent dynamic range, with only the brightest of white highlights clipped. If you're editing, you may want to crush the blacks a little to improve the contrast, but for video going straight to TV it will look great. (Frame grab)
This shot usually highlights artifacts caused by poor compression or a low bit rate; the G10's top rate of 24Mbps displayed no compression artifacts except in really low light. What you do see is some aliasing caused by the interlacing of the 60i video. (Frame grab)
While I would have expected the G10's eight-blade iris to produce slightly rounder bokeh, it nevertheless looks quite good during normal playback. Here you can also get a sense of the nice tonal gradations it produces, uncommon in a consumer camcorder. (Frame grab)
The G10 renders excellent low-light video, to a point. Lighting in this scene is about 17 lux, and it's some of the best I've seen in its class. Go just a little darker, though--to the light level of a shadowed living room--and it's the typical noisy mess, at least with automatic gain control enabled. (Frame grab)
I think this is a good illustration of why you can't assume a camera/camcorder with good low-light video quality will produce equally good low-light stills and vice versa; they generally use completely different processing algorithms.