Basically, technology is developed so humans don't have to do as much work, or can accomplish more work in a less amount of time. So who's to say that in 1000+ year all we do is sit while technology accomplishes everything for us?
I wouldn't say that's true, but I'm not going to say that is a certain fact. Humans invent technology to do things that are impossible, extremely timely or dull to do as a human. I don't know about you, but I wouldn't want to be building hash tables with abacuses and paper. I don't think technology will ever replace anything that a general number of humans find enjoyable at some given time.
Technology increases how efficient we are, not how lazy we are. Efficiency is defined work out per unit of work in. In example, if you have a system that requires 100 J of Energy to do 50 J of work, the efficiency of the system is 0.5, or 50%. Sure, technology allows us to do less work, but what's wrong with that?