At this point, I don't even want IE to be improved. Microsoft has immense resources at its disposal, and I would prefer to see that effort devoted towards truly new problems in computing.

Simply put, we finally have a number of incredibly good web browsers, and most of them run on Windows. Microsoft should embrace one of these, and stop wasting time and money (both its own, and that of developers who continue to have to test IE). Even a great IE is still yet another IE, that must be supported or not, and this effect multiplies across all the web pages in the world. A new IE contributes nothing useful at this point, that wouldn't be achieved by having Windows Update auto-install a Firefox, a Chrome or a Safari.