PivotTable-like frontends that allow slice and dice data exploration are in general associated with OLAP technology. Some of those frontends target one specific server, using a proprietary data model, and some others implement the standard: MDX queries over XMLA transport.
But when OLAP technology was designed 20 years ago, doing it in real-time seemed unthinkable. One consequence is that the XMLA standard has no support for updates in a cell set. Actually it practically forbids it because of the static representation of cell sets and cell set axis.
ActivePivot can push real-time updates into an OLAP result set and it exposes a (proprietary) streaming API to subscribe to those updates. The ActivePivot Live frontend was in the first place written to leverage those real-time updates, presenting them in familiar pivot table controls. But in 2013 ActivePivot is still the only OLAP server with real-time support. That explains why there isn't yet a standard to subscribe to OLAP real-time updates. And that also means that as of 2013 and outside of ActivePivot Live you will not find a toolkit (WPF or not) that has done the whole job of enriching its pivot table controls with real-time updates. The libraries we know of have actually transposed the static data representation of XMLA in their pivot table designs, making it cumbersome or impossible to update the cells (think of the Microsoft Excel Pivot Table for instance).
Under the constraint of a particular technology like WPF, I would select a general purpose UI toolkit, that makes it easy to arrange and compose tables. From there that's a D.I.Y. job.