@Viktoria Michaelis - It's not much different. But your last point is the one that actually has a decent market. As I chronicled in the post, people have been looking for an easy way to create these installation profiles over the past few years. Now they can create specialized packages of WordPress complete with all of the plugins or themes they need without having to search and install multiple times. Let's say you are dealing with customers that are within the same niche, you can then use WPRoller to create a WordPress package that is tailored to that niche and then you'll only need to tweak it here and there to match the clients needs. I think that's a big time saver for developers.