With modern cameras there's so much scope for cropping that I don't think exact framing is really necessary for a lot of people a lot of the time.
I may be wrong but I don't think that many people are truly honest about their needs. If for example all that's needed is a picture to fill a screen or an A4 sheet or even an A3 viewed anything like normally then what is really needed? I have A3 prints from my Canon 20D and some would say 8mp is overkill.
PS.
I read somewhere recently that 2mp is enough
Not for pixel peeping or viewing with a magnifying glass but for normal viewing by normal people.