That's a great suggestion, and something that we've been talking a lot about here on the team. There are a couple of reasons why the existing ArcGIS Runtime SDK for WPF 10.1.1 isn't suitable for distribution via NuGet (e.g. licensing and format/size of the SDK). However we're investigating more flexible ways of distributing the APIs included within the new ArcGIS Runtime SDK for .NET (Desktop / Store / Phone), with NuGet being one of the options we're looking at. Additionally there are changes afoot to the developer licensing for ArcGIS (see https://developers.arcgis.com/en/plans/ for more details).
It would be great to see your new products as NuGet packages, because it's very convenient. But the question was not about the ArcGIS Runtime (.NET or WPF), I was talking about the free outdated ArcGIS API for WPF 2.4: http://help.arcgis.com/en/webapi/wpf/ Sorry for the confusion, there is no separate sub-forum for WPF API and I'am not a native English speaker.
It will be nice to see this API as a NuGet package even if you won't evolve it anymore. Templates included in the setup are useless for now, because they target VS2010. Packages are very easy to create and publish. So why not?
