- Major performance increases
- Stunning 3D Views (switch views on the fly from table to card to 3D card in a few lines of code, preserving grid's state)
- Multiple card layouts, easy to place data in the desired card area
- Column virtualization (my sub-$1000 Dell desktop can run 1M rows by 1K columns, all loaded up)
- Column stretching, and column widths supporting star values
- IDataErrorInfo support (no other grid currently does this)
- Easy binding to XML data sources and inserting records into non-IBindingList sources
The album cover view and other built-in 3D views are currently postponed in favor of work on performance. The dev. team currently has a few interesting techniques in mind that should significantly improve the grid's overall performance. And this is in .NET
3.5. The recently discussed .NET 3.5 service pack (demonstrated at Mix08 by Rob Relyea) should also help with performance (text rendering for example).
That said, the Xceed Datagrid for WPF dev. team is rather well staffed so other features such as the 3D views are still not far off from being released (Q2 or Q3 '08).
Edits: Performance update and 3D views timeframe update.