This is a great idea though the component is still not good enough. Since DocBook is a better source to be converted into any other format of documentation, this component can make these jobs very easy.
But current version of this com_ has some inconvenience. Especially the language file is very limited. Most entries appear at frontend and backend can't be found in language file so that they can't be translated.
Hope the author will pick up this project and do more improvements. I am sure the DocBook format will be accepted by more and more users.
Thank you !