Now they are going to show json, xml, yaml, graphviz, audio files, video files, display docx, xlsx, pptx, prettify your minified code, build a database for you from SQL backups and let you query it, set up an environment from your .env files and give you a shell prompt, show you a rendered DOM from your HTML files and virtual dom declarations, display structured data from microformats, microdata and json-ld, let you…
If they integrate Atom online like Cloud9 then with automatic build\hosting its basically the full stack for developing and using the web where the current GitHub repo viewers are the equivalent of Finder/Explorer. The Google/MS capitulation to GitHub will be seen as a catastrophic handover of power if they can build a moat around this. Maybe the distributed and open nature of both git and the web will prevent any moat? Interesting times.