Sorry, "won't know what to do" is an inaccurate simplification of the problem. A better way to say it is that they may be ignorant of what's possible/happening.
Take a site like the iOS App Store (yes I know it's technically not a webpage, but same concept)...I go there to search for apps I want. I will almost never scroll down to the bottom because my first instinct is to hit up the search box at the top. In the time that it takes me to type a search in, Apple could show me up to two, maybe 3 featured projects that I otherwise did not know I would be interested in.
Could Apple have trained me to, once I hit the ios App Store front page, to scroll down to check out the list of featured apps and then conduct a search? Sure, but I'm at a loss as to how they could do that without encumbering the user (i.e. putting the search box at the bottom of th epage)
Take a site like the iOS App Store (yes I know it's technically not a webpage, but same concept)...I go there to search for apps I want. I will almost never scroll down to the bottom because my first instinct is to hit up the search box at the top. In the time that it takes me to type a search in, Apple could show me up to two, maybe 3 featured projects that I otherwise did not know I would be interested in.
Could Apple have trained me to, once I hit the ios App Store front page, to scroll down to check out the list of featured apps and then conduct a search? Sure, but I'm at a loss as to how they could do that without encumbering the user (i.e. putting the search box at the bottom of th epage)