I switch between IntelliJ and Emacs all day, and all I had to do to become comfortable is choose the Emacs keyboard preset in the IntelliJ preferences. The same is true for Eclipse and Visual Studio.
The Emacs paradigm is a lot more similar to contemporary IDEs than the Vim paradigm, and that makes it a lot easier to switch back and forth.
While a better Vim is a nice goal, I don't see how it will bridge the gap between Vim and newer editors/IDEs unless it includes some fairly fundamental changes to the Vim paradigm. But then it wouldn't be a better Vim -- it would be something different enough that Vim users probably wouldn't like it. I suspect that Vim and modern editors/IDEs are doomed to remain divergent forever.