yaix2 - 8:42 pm on Jun 15, 2011 (gmt 0)
For websites that get "pre fetched" it will be better, because they load faster. Users will click the first SERP position more often, because they will learn with time that it loads the fastest. So you get more traffic at the end if you are at that position.
And its great for websites with lots of JS libraries and interactivity. All the scripts usually take a long time to finish loading, but only on the first page load (later the JS and CSS is cached). With pre fetch, that first page load will not be noticed by the user.