You'd still be entitled to the surplus value of whatever other labor you do. Through central planning a socialist state can move all the people who were displaced by automation into other fields, and with the amount of hands that are freed up by automation you'd probably work very little. On top of that the commodities that are produced through automation would be owned in common and would be put towards meeting everyone's needs, so no one will be homeless or will starve because they no longer have a job. If all labor is automated (which can't really happen IMO) we'd still have all the commodities, yet held in common and given to each according to their need.