This sentence sums up what the article's really about:
Now, developers and early adopters can install a developer version of IE that can run alongside their existing IE11 installs on Windows 7 SP1 and Windows 8.1.
Here's what drew my attention:
IE now also supports access to the Xbox controller for web-based gaming, and the team has improved WebGL performance and added support for a number of WebGL features like 16-bit textures and triangle fans.
<sarcasm> So quick, run out and buy an extra Xbox Controller. I do so hope that the Xbox controller code woks with the Facebook APIs, so that I can navigate Facebook with my Xbox controller! That'd show them other browser makers! </sarcasm>
