Yesterday in the keynote session at BUILD 2013, we announced the availability of Visual Studio 2013 Preview and .Net Framework 4.5.1 Preview which can be downloaded here. For detailed on this, I recommend you to visit Somasegar's blog for a look at what's new in this release of Visual Studio and you can also find additional resources on getting started with Visual Studio 2013 Preview, on MSDN. Also make sure to check out our other blogs that will have lots of news and updates about Visual Studio 2013 Preview: http://blogs.msdn.com/b/developer-tools
Download the preview, try it and please share your feedback on the same. Enjoy!!