Preview of Visual Studio Tools for Applications (VSTA) 2012 for VS 2012 RTM now available (think "Adding a custom IDE to your app's and allowing end-user dev's to code your app's with it")

Microsoft Downloads - Microsoft Visual Studio Tools for Applications 2012 RTM - Preview

"Microsoft Visual Studio Tools for Applications gives you a way to enable end users to customize your existing applications using Visual Basic and Visual C#. You can incorporate a custom integrated development environment (IDE) that is similar to the Visual Studio IDE into the application

Version: Preview
Date published:10/2/2012

Change language:English, Japanese, Spanish

ENU\vsta_setup.exe, 5.6 MB
ESN\vsta_setup.exe, 5.6 MB
JPN\vsta_setup.exe, 5.6 MB

.... End-user developers can use the IDE to customize the application by creating add-ins that extend the functionality of the application to meet their needs. ..."

I dig this idea but I have to wonder if this end-dev extension model is a dead end? The new app extension model in Office 2013 seems like the future and VSTA the past...?