If I'm not negatively affected in any way, why should I upgrade?

Also, how does a user who doesn't upgrade notice a change in wallpaper which doesn't take place until after the upgrade? By looking at someone else's desktop which is running the release version?

What if the user has changed to a custom wallpaper, and doesn't remember what the original wallpaper of the leaked OS looks like?

>Also, how does a user who doesn't upgrade notice a change in wallpaper which doesn't take place until after the upgrade? By looking at someone else's desktop which is running the release version?

The type of person who is downloading leaked pre-release builds in order to have the latest and greatest generally follows the latest news about new leaked builds.

Ok, so they see it in some screenshot. "Hey if you get this, your desktop will look different" and that somehow motivates them. :)