The first new feature is an increase in the size of the comments box in Google Docs. Currently, the comments box accomodates 35 characters before a new line is created. The new version will accomdate 50 characters before a new line is created. In other words, the comment box is getting wider. The width of the box will expand or contract to meet the requirements of the screen being used. Wider screens will have a wider comment box in the margins of the document. Look for this update to start appearing in your Google Docs in the next couple of weeks.
The second new Google Docs feature to note is the ability to add image watermarks to your Google Documents. This is something that Microsoft Word has offered for years and people have requested the same for Google Docs for years. Now when you open the "insert" drop-down menu in Google Docs you will have an option to insert a watermark image. The watermark will appear on all pages of the document you are currently working on. The new watermark feature will be rolling-out over the next couple of weeks. You can see a preview of it here.