Haha, for me, pair programming started in on the Apple II in the Library with Oregon Trail. Our sprints were 7 minutes long :'(
I'm always delighted at how much better computers are now that I don't have to sit at a punchcard machine for hours producing a stack of hollerith cards with my program. Then present the stack to the attendent at the Univac mainframe computer's batch desk. Then wait a few hours to see the result of the program run: on a paper readout wrapped around the cards - only to see that the program failed to run due to a syntax error! Back to the punchcard machine to try again with corrected cards! That was "Introduction to Fortran" at the University of Maryland, 1979. [Fun fact: Hollerith cards are roughly the size of the U.S. paper money in circulation in 1890.]
Having a personal mainframe in a one foot cube was a great improvement, which I still enjoy learning about and fooling around with. But the iPhone absolutely blows me away! It's like science fiction!