Sometimes I hesitate clicking on a link because I don't know what the resulting page will look like - it's a leap of faith. So here's a potential solution: If I hover over a link for about 500ms (just like hovering over a username on Facebook), I see a small modal popup displaying a thumbnail of the resulting page. It would be trivial for Google to implement this in Chrome.
More context, happier browsing.
EDIT: I've done a screensnap to show you what it looks like in my WordPress Dashboard for Comments (where I apparently cannot turn it off): http://mikecanepics.wordpress.com/2013/01/05/site-preview-in...