Hi,
There is still documentation that needs to be updated to demonstrate using Touch-optimized UI instead of Classic UI.
However, you can use either UI for the basics of selecting a site, creating a new page, selecting a template, and adding components.
For an example of using the Touch-optimized UI, you can visit
http://docs.adobe.com/docs/en/aem/6-0/develop/social-communities/tutorials/create-sample-page.html
For more information about the UI and authoring, visit
http://docs.adobe.com/docs/en/aem/6-0/author/page-authoring/author-environment-tools.html
http://docs.adobe.com/docs/en/aem/6-0/author/author-environment/basic-handling.html
If you have more questions, please let us know.