Cisco has replaced General Motors on the Dow 30 Industrials index, further symbolizing the rise of the well-clichéd "Information Superhighway" relative to industries based on actual superhighways.  This isn't a literal substitution - people haven't dramatically moved to drive less because online shopping is easier, though it does seem to be elastic with gas prices.

Recall the Yellow Pages slogan "Let Your Fingers Do the Walking" which implied that at one time, you had to do a lot of walking (not driving) to find goods and services.
AT&T is still in the Dow 30, as fingers still walk over keyboards and cell phones, while B.F. Goodrich, maker of shoes for all that real world walking and tires for all that real world driving, joins GM in the league of also-rans.