Linux derivatives on laptops/desktops will never be more than a geek’s hobby so long as they require a geek to do anything other than surf the web.
I think that when my 12-yo son can install a Linux system from scratch--without any prior Linux experience--without me around to help, and I never have to support it, then I think that it is ready for anyone to use.
Hush, they may be listening on /.