With Authorea, LaTeX is only one of several formats you can write in. Others include Markdown, and HTML (rich text, like MS Word). Authorea offers a format-neutral, web-native platform. Regardless of the format, you render content on the web -- not in a separate pane. The advantage: you can collaborate with authors who don't know (and will never learn) LaTeX. Authorea's rich text editor is a true WYSIWYG editor (What you see is what you get). It also has the ability to include as much LaTeX and mathematical notation as you need. Every document written in Authorea becomes a beautiful webpage.