Glad to report that Many of the events asked here are GA!
please check this pageto see details;
We are still to provide (other are in, please try them!)
i want to Automatically refresh the workbooks when i make changes in workbook 1..should be automatically refreshed in workbook 2, when 2 tabs are already open.
currently i do not find any events for this until i create button and refresh it.
Gary Miller commented
There are a couple of events that it would be nice to have that are currently available in the desktop version. For example Scroll events. Currently it is not possible to sync and AddIns UI with the Excel UI.