Yes, but as the iPad and iPad apps have become more and more powerful to the point the iPad is approaching the functionality of laptops, there is a growing demand for the ability to share files between apps, so at least rudimentary Finder functionality is desireable. As I understand the concept there still won't be a file system per se, but you will be able to find files across applications and even open those files in other apps.
To some extent could the iCloud give this functionality? You would just need the ability for an app to access iCloud; something like an Open/Save dialog. Of course some users might resist the forced use of iCloud for this capability.
