What are the most important IDE features missing in Vim?

Question

I have been programming almost exclusively in Vim since 1/1/2001, and I feel that Vim fulfulls all my needs as an editor/IDE, but I can't help but wonder if perhaps there have been some new killer features developed for other IDEs in the last decade that would allow me to be more productive than I can be using Vim. So I ask: What are the most important IDE features missing in Vim??

Answer 1

1. Integrated debugging with all the fanciness that Visual Studio/Eclipse provide (thread debugging, etc etc)
2. Autocomplete with inline documentation support for methods/properties
3. Build and run from 'within' the editor application