I like this addition. I'm curious if there are plans for a UI to help design these files. I'm thinking something like the settings tab in the project properties.
⚠Do not edit this section. It is required for docs.microsoft.com ➟ GitHub issue linking.
There may be plans for a UI designer - hopefully the product team will answer that. Also, if your codebase is C#, you can use the IntelliCode extension for VS to automatically create/infer an .EditorConfig file. See https://blogs.msdn.microsoft.com/visualstudio/2018/07/17/visual-studio-intellicode-inferring-coding-conventions-for-consistent-code/ and https://docs.microsoft.com/en-us/visualstudio/intellicode/intellicode-visual-studio.
VS2019 will have a feature to export an EditorConfig file from the current VS settings.
@cremor Thanks for bumping this issue, and you are correct, Visual Studio 2019 includes a button on the text editor code style options page to generate an .EditorConfig file from your settings:

plans for a UI to help design these files.
The world is shifting towards editing basic human-friendly formats (e.g. JSON).
We need no UI. We need no more UI bloat in VS. Learn to use your text editor.
The EditorConfig format is easy peasy to understand.
Most helpful comment
VS2019 will have a feature to export an EditorConfig file from the current VS settings.