"Global copy and paste" as a phrase keeps coming up (mostly from the celebutrolls) but they actually mean "copy from browser and some non-editable text fields". The first is app-specific (and half implemented, but hidden), the latter may require something new in silica and then apps to flag only certain strings (like, you don't want EVERY string of text to be long-hold copiable, right, copying your battery percentage would be a bit of a strange use-case)