I haven't used ChronoForms, but I have used K2 and Zoo. Both of them feel like they're made to overcome some shortfalls with the stock Article system. They both use "items" instead of articles, and then you can (nearly infinitely) expand on what that article can display by adding things like extra fields and 3rd party plugins (such as google maps). Think of it as a very customizable article system.
With K2 you can style categories and even override the output greatly and all the articles in each category take on that format and style. There are also some great filtering modules available that can use both tags and extra fields to sort the results.
Since you can completely customize the output, you can create loads of extra fields in the back end (plus images and image galleries), populate it there, and then have them display the data in a custom layout on the front end.
With Joomla 3.x and tags, plus some 3rd party custom field plugins you can get closer to this with the stock articles, but it's not quite there yet.
I have no idea how close this is to ChronoForms, but the name (to me) denotes it's made for gathering info on the front end. While Zoo can do this (and I assume K2, but I've never done it), I don't feel like that's the primary function of these CCKs.