Before we get any "what do we need another browser for?" posts...
Konqueror is much more than a browser. I'm not sure of the specifics, but I know that Konqueror is a major part of the KDE system. I think its role is similar to that of Explorer in Windows, in that it provides file management, web browsing, and other functions.
Getting Konqueror ported is a big step towards porting KOffice. KOffice isn't yet up to the same standard as OpenOffice, but more choice is better 🙂
Also, this port of Konqueror does not require (and does not use) X11. I think that this Mac version is the first non-X11 port of Konqueror.