How cool would it be, if users where able to open different kind of tabs?
For example i want to see how my web-project looks in several kind of browsers, so i could create a Google-Chrome Tab, InternetExplorer Tab, Firefox Tab or Opera Tab.
I know its hard to realize such a functionality, but maybe the Browsers provide the functionality to talk to their renderfunctions. In that case you could check which browsers are installed, and include them directly into the editor.
SublimeText is a Texteditor and i know that some people are not going to need this functionality, but its a cool idea, and its worth to get realized if its possible.
Customer support service by UserEcho