Nikon D80 or D7000 set on RAW+JPEG, images viewed in iPhoto.
Good quality screen and internet connection are needed to see the difference.
RAW capture has more shadow detail, less saturation and contrast, and smoother tones in the highlights. Check out the sun ball and the deep under ledge shadow areas.
Of course the idea with RAW is that it's just the starting point. Adjustments to exposure, contrast, saturation and sharpness are most likely needed. But you can make these adjustments with less degradation than if you started with the JPEG.
By degradation I mean visible banding in the graduated tones of the background water, and digital noise or speckling in the darker areas.