> This release of the IE Developer Channel uses a combination of code changes and App-V Client to virtualize and run alongside IE11. This virtualization creates a small performance hit, so we don’t recommend you use this version to measure your site’s performance.
It'll be using a veritable pile of standard Windows libraries no doubt, so you'll not be able to just run it on Linux or OSX if that is what you are asking.
By "able to run independently" I assume they are meaning that it won't have to become the one and only version of IE on your machine as other versions do meaning you can run it along side other IE versions (unlike with 11 and prior which essentially require you to have a separate Windows setup, usually in a VM, for each version you want to test against).
It was a tongue in cheek reference to the antitrust trial of the 1990s where Microsoft spent millions arguing that IE was inseparable from the core OS.
