Mark Hurst wrote recently on his Good Experience blog about the brief failed experiment that was the talking car. The car would verbalize status warnings like "the door is ajar" and "don't forget your keys." My grandfather actually had one of these cars for a while, and I thought his hatred of it was unique to him; "the door is ajar" was usually followed by his "go to hell!" But it turns out from Mark's account that this was a pretty common reaction. People who oohed and ahhed at the feature in the showroom came to despise it as an annoyance after a couple of weeks of ownership. It's a good case of design-for-sales, not design-for-use - and a "feature" that turned out to be a liability.