I became quite unhappy with the image quality of the HF100. It's always the same. First there was Super VHS and VHS suddenly looked bad. Then came miniDV, then HDV or AVCHD. Every step looked like a big progress. But in fact they where tiny steps, the sensors in the cameras always remained smaller then the fingernail of your pinky. The actual resolution makes one cry. Will there ever be an end to this? I think so. Image quality from large sensor still cameras is at a point where little improvement can be done. Photos look just great. Now movie quality has to catch up and all will be good. At least for 2D since we'll probably progress to 3D visualisation in our living room then :-)
I watched a lot of Nikon D90 DSLR videos recently at vimeo. This model has a sensor of the same size as a 35 mm cinema camera. The depth of field and the colors and the overall look of the videos makes my HF100 pale. Sure the D90 shows a lot of JPEG compression artefacts and has a low bitrate and no control but nevertheless it looks very good at 640 x 360 size. And it will only get better with upcoming models.
I recommend watching these videos from the D90 to get the feel of the "new look" future cameras promise. The D90 has bad resolution but the images feel warm and analog.
www.vimeo.com/1694439
www.vimeo.com/1696848
www.vimeo.com/1775787
www.vimeo.com/1713382
Pentax K20D(21f/s) + DA55-300mm from ligar on Vimeo.
The above movie represents the holy grail (Download and watch the original!). Some day there will be no difference between the quality of a photo and a movie frame. Until then we have to live with the crippled products the industry is willing to give us consumers.
After seeing the "look" of big sensor movies I will never ever buy a small sensor camera again. Period. By the way I observe all these changes at myphotomoviecam.blogspot.com