Bingo, this my first response as well. What happens when users stop clicking through to content because it's being served up by Google, Bing or Yahoo?
I guess it could actually hurt them as well. If users aren't providing information back to the algorithm in the form of a click through related to a search term, don't the search engines also risk losing a key signal of relevance?
Why unilaterally assert this will decrease click-throughs?
If I see immediately relevant data for restaurant hours, movie times, a person's bio, etc, I'm far more likely to click-through and start looking at a menu, making a reservation, or getting more background.
They may well expect increased click-throughs leading to more site traffic for those who adopt.
I guess it could actually hurt them as well. If users aren't providing information back to the algorithm in the form of a click through related to a search term, don't the search engines also risk losing a key signal of relevance?