The point of this example was not to discuss how this shot of a color card translates to a photo of a subject. There is no way you can make a judgement of one with the other.

However, to clear up the air as to what is possible from similar cameras....I print shots for portrait customers at 20x30 regularly. I've sold 24x36 inch images hanging in restaurants and I have sold fine art nudes as large as 20x40. I can assure you they look excellent at close distances. Otherwise, they'd be given away as opposed to being sold.