Microsoft’s Internet Explorer 10 will not support any browser plug-ins when running in the new slick Metro mode. Most notably, that means no Flash support and a reliance on HTML5, JavaScript, and other standards-based technologies for video and other interactivity. When running in standard desktop mode, IE10 will support both plug-ins and extensions.
Metro is the touch-friendly, full screen interface that will run on top of Windows 8 and be the main mode for touch devices such as tablets. According to Microsoft, “running Metro style IE plug-in free improves battery life as well as security, reliability, and privacy for consumers.”
This is another big blow for Flash, which is already not supported on many mobile devices including iPhones and iPads. While there are still things Flash does better (or more consistently across browsers) than HTML5 and JavaScript, developing in Flash is making less and less business sense as mobile web usage continues to explode.