Most videos are an advert for something, and why not showcase something like this grid? Microsoft have a belated DataGridView for WPF in
development now but you can tacitly assume that it will never compare with this one, just like the
Silverlight grid has already lost out to the free
Devexpress one.
With prior WPF technologies, Microsoft always had some base controls, that were either augmented or redeveloped by companies like Xceed. Indeed their own winforms grid pales in insignificance to the Xceed one which Microsoft themselves use in their products (even today).
This is a market leading component and deserves the credit it gets. These guys were squeezing performance out of the grid before .NET 3.5 SP1 and the grid was already fast then.
In general (except for Windows and Office) Microsoft are very slow to release any eye candy and if you are a WPF developer today you need the Xceeds and Lawson Smart Client folk to lead the direction inspiration wise.
Thanks for the vid and the xeptional grid!