Looks good, but not to burst your bubble as it looks like your worked hard on it. I do not think Laurent is going to change the current logo to this one. A while ago(couldn't find the thread) Laurent had had a thread open for submissions for a new logo. So after he chose the new official logo from there I do not think he is going to change it again.
By the way, where did you get the mini images(mouse, screen, earphones...) that you used around "SFML" in your logo?