If someone makes a cell phone which looks like the old mobile phones, would you buy it? Probably no. But would a person making lathe machine customize his machine's shape and looks and trade it off for a reduced performance or function?Again No. So the answer is, it depends upon who the customer is and what is expected. If it's some product which should attract customers with looks and ergonomics then people will tend to place more value for form(like ipod nano). But if the performance is of utmost concern and not the form factor, then functionality will rule.