WordPress Version 2.5 has scheduled to be released in March 10, 2008.
After checking out the demo i don’t think i see anything “COOL” in it though the admin interface does seem to look a bit more flexible, i hate what they have done to the upper-top navigation menu, its hard to see. I’m talking about where it shows (Dashboard->Write->Manage->Comments, Blogroll, etc, etc.) – the breadcrumb.
I am also not sure about the compatibility with the current plugins, it could be that the Plugin authors may have to update their code when this version officially releases.
Have a look at the wordpress admin demo, and let me know what you think about it.