Per project intergated IDE module with live collaboration support
Similarly to how Google Docs works, only with syntax checking and saving the open documents will be = a commit. This one is definitely out of the list of "miracle features", but hey, Elon Musk intends to make space traveling to Mars possible by 2025, that's not far in to the future at all. XD
I guess though this feature wouldn't make a lot of sense without another feature, which is the with appropriate frameworks for live testing of the code as well. I mean, in the beginning this could sorely work for front-end only, but eventually back-end support for other frameworks could possibly also be required.