as long as there are things in and our lives to improve, there are opportunities to build great companies that provide a lot of value
i dont think those exist purely in software anymore- but if you look around at say, the skyrocketing number of elderly and nursing homes (just as an example) there are probably dozens of ways to improve lives and make a good living there
and electronics and hardware has always been so difficult and expensive to get into- but with new infra and workflows and 3d Printing and getting stuff from China- it's vastly cheaper and easier to do a robotics or hardware startup than 20 years ago
there will always be opportunities!