For instance, I very rarely want more informations about the files from an "ls" command; and if I did, I'd probably use Finder instead. On the other hand, not having enough terminal real estate to display the entire directory at once is a very frequent problem. From that perspective, adding icons is a step in the wrong direction.
Thinking about it, if I were playing with making a better terminal, one of my first lines of thought would be things that made it quick and easy to break information out into other windows, because scrolling back and forth in the terminal's buffer is a PITA.
Of course, this new terminal might be exactly what the author needs, and more power to him if it is. There's no need for us all to use the same tools. (Thanks heavens -- I want nothing to do with Emacs or vi!)
The thing that strikes me as very, very cool about this project is that you might not need the Finder at all any more.
You know what would rock my world? A "lsf" command that emulated "ls" as much as possible, but launched a Finder window appropriately sized to display the results.
As for why? Because it will be optimized for keyboard interaction and rapid context switching.