Ah , found some more information on my travels!
Here is a handy 'cheat' sheet that details all the keyboard, mouse and touch shortcuts for Win 8 CP ... Windows 8 Cheat Sheet: Get Started Easily! - Dr. Doris Chen's Blog - Site Home - MSDN Blogs
According to this the Power Tasks Menu has no touch shortcut! No wonder I can't get it going!
Of course we are still in beta so things like this are still being worked on ... this is a handy little chart though , worthy of a sticky possibly?