I am pretty certain that IE will never make it on to any other device. IE doesn't just have a bad reputation, it has earned it. I agree that the newer version are certainly better than they were, but IE on the desktop just isn't that hot. I enjoyed IE 10, but I upgraded to IE 11 and it has been one of the worst browser experiences I have had. If IE on mobile is actually better than what is currently offered on other browsers, then I agree with you. If it isn't much better than what is on the desktop, its just a waste of time.