Google V8 Debugger Protocol support
Martin Kallman commented
Re: debugging Chrome - they will be migrating to the WebKit protocol for the browser
Ewoud van den Boom commented
This would allow one to also debug applications running in Chrome. The thing I like about VS is that the debug and edit environment are one and the same. With Node you typically use two distinct tools (an editor and a debugger). I believe with this feature VS would instantly become the best IDE for Node development.
Business case for MSFT: this would attract the growing Node community to the MSFT dev toolset, drive adoption of Azure in the Node community. Also Chrome is used by approx 25% of MSFT customers so this would increase their satisfaction. Besides that this would favorably impact the perception of Microsoft in a part of the developer world ("HTML5 geo-scale web app developers") where Microsoft does not currently have much inroads.