Have you thought of “technological unemployment,” where machines take all our jobs?
The outcome will depend on how things are distributed. Everyone can enjoy a life of luxurious leisure if the machine-produced wealth is shared, or most people can end up miserably poor if the machine-owners successfully lobby against wealth redistribution. So far, the trend seems to be toward the second option, with technology driving ever-increasing inequality.
Here is an example via Business Insider or 3D Printing of Bridges in Amsterdam