Your comments

Yeah but it only does half the job i.e. there's no support for PHP and CSS as far as I could tell.

I agree we need one. I'm not into complicated stuff and certainly don't want to be dealing with code when there are better ways that could be implemented. 

It's been driving me mad, I don't like using other people's versions of the default colour scheme and I haven't been able to find a good one for editing files that have a mix of PHP and HTML5 as well as CSS and JS files (in other words, WordPress theme files!). 

So +1 for a visual editor, and I really hope it comes to fruition. I keep gravitating back to Notepad++ because it has what ST2 doesn't have, a visual way of editing colour schemes. 

Oh and it needs to work on Windows!