I don’t think everything is going away anytime soon. Nobody knows for sure though. Just look at the speed of technology. My first PC cost me 3,500 dollars was a 286 processor with a 20 meg hard drive and a 128k video card. It used 3.25″ 1.44 meg floppy and 5.5″ 1.2 meg floppy disks. That was back in the mid 80’s. Today you have solid state memory and tables that can do all that could and more for under $100. In another 20 years we could have more mainstream thing like autonomous cars maybe even flying cars. Remember the Jetsons? Who ever thought back then you could really make video calls. Years later you could. We had video conferencing and today with smart phones you have face time..Even though we are progressing at a rapid pace they will always be new job avenues like security and repair of the infrastructure of the advancements we make.