Evolving Past PowerPoint?

Paul Pival, The Distant Librarian, points us to a list of dozens of PowerPoint alternatives. See it here.
Also, Google is rumoured to be near ready to launch the next module of it’s Google “Office” line along with Google Docs and Spreadsheets, Google Calendar, GMail, etc. It’s called Google Presently for now.
So, we’re heading for another great debate of what works for us.
Stephen