We have decided to postpone the official release of the new JS/HTML5 based Report Viewer. You will be able to test a preview of the new feature before Q3 2013. For now we cannot give you an ETA for the preview, so please follow up our blogs for news when it will be available.
Let us know if we can be of any further help for you at that moment.
Have you tried the new visualization options in Telerik Reporting Q2 2013? You can get them from your account.