It will not contain libosso-help anymore and thus won't have any central help system at all anymore. The idea is that every application now does its own help system however it wants. This is imho a very bad step backwards as it will just cause help systems to disappear
The finger scrollable text windows (HildonPannableArea with GtkTextView inside) don't support text selection. Thus most applications like modest and e.g. the web browser won't allow to select text for copy'n paste (this is still possible using the cursor keys but only if the text is actually editable and has a visible cursor)