Today, the Internet Explorer team announced the preview availability of RemoteIE via Azure RemoteApp. This is a free service from Microsoft that allows you to run the latest version of Internet Explorer on the Windows 10 Technical Preview from your Windows, Mac OS X, iOS or Android devices, without the need to run a new OS or heavyweight virtual machine on your device. Going forward, this will be the recommended way for developers who are not running Windows 10 to test the latest IE preview versions.
To get started, simply sign up at https://remote.modern.ie with your Microsoft account and follow the directions to download the Azure RemoteApp client for your platform.
The blog post from the team has more info, as well as Vine video examples of how it actually works.
This is good timing, as IE11 just surpassed IE8 as the most popular browser in the world.