I used to think it was just a matter of product cost to do active cooling... really the problem isn't the temperature it's the dew point! Which I guess could probably be solved with enough hardware, planning, and cost as well... but a ridiculous amount compared to adding an electric heater for the opposite problem.
Come to think of it does anyone know of a consumer device that utilized active cooling (as in would get colder than ambient not just fans or whatnot)?