Take a look at this updated link: http://demos.telerik.com/aspnet-mvc/chart
(More product info is also available here: http://www.telerik.com/products/aspnet-mvc/chart.aspx
The new charts in the Telerik Extensions for ASP.NET MVC are powered by HTML5 technologies, allowing the data visualization to be quickly rendered in the browser. No need to generate images on the server and ship them to the browser. No need for plug-ins.
Under the hood, the charts use both SVG and VML for rendering, depending on the browser. This maximizes compatibility with new and old browsers.
Today we offer the Bar and Line chart types. In future releases, we will continue expand this, likely adding Pie charts next, followed by chart types that have the most demand. I hope this helps explain what Telerik is doing for HTML5 charts. Let me know if you have any questions.