Mixture.io does something similar to this, also. Plus it does versioning and git push. Only negative is it forces you to use a liquid-based templating engine for a compiled static deal, kinda like Jekyll.
I think if you can take the good from each, and scrap out the bad, you'd do pretty damn well. Here's what I'd like to see, personally:
- Cross-platform, at least Win & Mac
- Use my own choice of text editor
- Built-in server that I don't have to mess around with, which is what I
love about WebMatrix
- Automatic SASS/Compass compiling
- Git
and SFTP push
-
Optional compiling of liquid templates for static HTML sites (maybe even just fire up Jekyll for you)
- Live reload/code injection of browsers, at the very least Chrome
That's all I can think of right now, but it's a start.