I'll give a bit on what the article said. These things may or may not have been previously mentioned.
Described as an extention of Texture master. Includes a full range of brushes, tools, strokes adn alphas that can be used when painting detail.
-Multi Resolution Modeling
Described as a SubDivision modeling system on Steroids. Allows you to model through different levels of subDiv and make changes that propigate up through the model...I.E. Your working on a model, you are detailing it and then you decide to change the overall shape, no problem go to the base mesh make the changes and it makes the changes without messing up what you have detailed...(I already kinda new this but the article made more sense to me that what we've heard so far.. )
-Intergration of both Normal and Displacement Maps
Most of us I thinque are up to a degree on this topic. If not well there is a great thread started on spiraloid that you might want to read on this topic. This of course will make Zbrush very cutting edge...Or is that more cutting edge.
-Polygon Management Tools
Described as a way of hiding grouped polygons so as to allow you to worque closer in detail. Now this is something I didn't know about and for one am very glad for it...
Not much información on this but "it promises more room to work." I've gotten used the current interface, Don't know how this is going to be "Improved"...
-Extendibility, via new plug-in Architecture.
I didn't know that this was coming but that really really is good news for plugins and people that like that kind of stuff...
-Assortment of New strokes, improved import/export.
And to quote the article, "...Zbrush is now a serious film production tool and is unique in many respects."
Oh and the other quote,
"At the time of writing, Zbrush was in beta testing, however, it should be available for purchase by the time you read this."