A bottle and three dirty goblets floated in and landed on the table. ‘About time,’ grumbled the sorcerer. After a moment, when the invisible servant had presumably left, he went on, ‘I declare, there is no decent help to be had these days....' -- Three Hearts and Three Lions - Poul Anderson
That is a classic D&D image. The spell would be seen by many as a waste, but having it to use was very wizardly. It allowed for actions outside of combat. It showed in it's simplicity that there is more to D&D than killing things.