I have seen a lot of writers slam Microsoft Word and praise minimalist Markdown editors. But I never understood that.  Here is Word 2013 on my Surface RT (you can do the same on any another device).  Auto-hide ribbon and taskbar are enabled. This is the entire screen, not just Word’s window:

You can choose to auto-hide the ribbon, display tabs only or tabs and commands. So if you want a distraction-free environment, Word can do that. And when you need the full power of Word, it can do that too. Tabs only:

Tabs and commands:

Auto-hide: