Heidegger proved right...up to a point.

[sensaes]

"An empirical test of ideas proposed by Martin Heidegger shows the great German philosopher to be correct: Everyday tools really do become part of ourselves. The findings come from a deceptively simple study of people using a computer mouse rigged to malfunction. The resulting disruption in attention wasn’t superficial. It seemingly extended to the very roots of cognition."

More here: http://www.wired.com/wiredscience/2010/03/heidegger-tools/

Have a great weekend, everyone.