30 years ago: March, 1984. There were two kinds of computers: mainframe computers which were as big as a refrigerator (and which were both amazingly expensive and amazingly primitive by our standards) and the IBM PC, a personal computer which could have as much as 640 KB of memory (but nobody would ever need that much) and which had one or two floppy disk drives. Programming was done using COBOL or FORTRAN on the former, and BASIC on the latter.
Now use that data point to extrapolate forward to what we have today. It isn't easy to start there and predict 30 years forward, is it?