If spotlight is your answer to launching apps, why even bother with app icons? Just have a home screen and spotlight. Have you ever tried organizing apps on 3+ pages? Moving an app across several pages is just painful. Then of course, since you can't have any empty spaces, if you move an app to the front page it will bump icons for every subsequent page behind it, making organizing them an absolute nightmare.
Well, as Jan of 2009, there have been
800 million app downloads and
14,720,100 iPhones sold. That comes to an average of 54 app downloads per iPhone. Including the 14 default apps, that is a grand total of 68 applications. At 16 apps per page, that is an average of
4 and a quarter pages per user.
So, for all of you using only 2 or 3 pages, there is someone using 5 or 6 pages.