The Inspiron 8600 has:

15.4 inch Wide-Aspect UltraSharpTM TFT Active Matrix displays in a choice of WXGA (1280x800), WSXGA+ (1680x1050), or WUXGA (1920x1200)

I'm not sure what the complaint was. I'm sure that your father's business (yes, I know I'm responding to two different people) specifically ordered the more expensive option. It's not like Dell gave it to them for free. There's a $150 premium on the highest resolution display from the lowest (assuming that model; I'm sure that other models with the same options have similar price discrepancies). If they made an uninformed decision, I'm sorry, but that's hardly Dell's fault. They don't have the optometry records of your father's business colleagues to suggest that that might not be the option they want. Personally, I'd be offended if I ordered something and was told that that's not what I wanted. Perhaps in the future you could advise them on their purchases.