Together with a whole range of other product updates, Apple released a new version of iWorks (including Keynote) last night. I installed the Mac OS X Mavericks (warning, this will take your computer down for an hour) and played around with the new software. Observations in random order.
All iWorks apps are now free for people buying new Macs. iWorks was already a lot cheaper than Microsoft Office, but now the economic argument against enterprise adoption has been removed completely. Still, the huge installed base of both Windows hardware and PowerPoint with its familiar user interface will make it hard for Apple to make an inroad here.
What could help them is the cross platform compatibility. As of today, there is one file format both for desktop and mobile versions of keynote. I still do not fully understand iCloud, where my files are, where things get saved or not, but the duplication of a file when opening it on your mobile phone is gone. A step in the right direction, but not all the confusion has been removed.
Apple has also launched their suite of iWorks web apps. You can now edit and present Keynote presentations right from your browser. You can simply share a link to the presentation with your co-workers, rather than sharing heavy email attachments. More than one person can edit the live presentation. Many other services offer this feature, but personally I find it a bit scary when I loose control of how makes what edits (including deletions) in the master document. Anyway, that the feature is available does not mean that you have to use it.