What happend with Mobile Preview, which was introduced in XE5?
http://docwiki.embarcadero.com/RADStudio/XE5/en/Mobile_Preview
in 10 Seattle, that help page was deleted: http://docwiki.embarcadero.com/RADStudio/Seattle/en/Mobile_Preview
It would nice to have the possibility to use mobile skinns on windows for debugging and testing.