As part of today’s Windows 8.1 Preview, Internet Explorer 11 (IE11) Preview is now also available. Fast, fluid and perfect for touch, IE11 continues our vision of providing the best Web experience across the full range of Windows devices and screen sizes – an experience where sites and apps work flawlessly together. IE11 offers better touch performance, faster page load times, a continuous browsing experience across your Windows devices, and completely rebuilt F12 developer tools.Internet Explorer 11 Preview Introduced [blogs.msdn.com]
Please install the Windows 8.1 Preview from the Windows Store to try IE11. You can find a full list of new functionality available to developers in the IE11 Preview Developer Guide here. We look forward to reading your feedback on Connect and continuing to engage with the developer community.
I try to stay away from Metro apps in my daily PC use. I can't remember the last time I had one open. However that must be confusing to tablet and touch laptops where you might have the excuse to use one or the other.