Apparently, Robert Scoble came up with the idea for this. He must have plenty of time on his hands.
As technology improves, or just changes, various skills that were once of value ... and perhaps even impressed one's friends ... become totally redundant.
Some examples: adjusting the tracking on a VCR, keeping score in tenpin bowling and reading a table of logarithms.
If you want to see a longer list, or can think of any good ones you'd like to add, check out the Obsolete Skills Wiki.