IE11 on Windows 8/8.1 got updated with EME and MSE for Netflix HTML5 video. Also new F12 devtools.
IE11 on Windows 7 is sadly not getting any new features, only updated with bug fixes and security updates.
IE11 on Windows 7 is sadly not getting any new features, only updated with bug fixes and security updates.
So far, it really hasn't been the case since before IE6 came out.
With Windows 10 deploying en masse, IE11 is already in sunsetting mode. Windows 10 and Edge is on rolling updates so they are getting new features more frequently. Service Release 1 is out next month and Threshold 2 features update is out by year end.