The Pages, Numbers, and Keynote apps have been updated to now include improved Retina display support, an updated design for the editor tab, and improved sharing functionality.
Specifically on the improved sharing, users now have the option to share documents in a view-only state whereas before anyone could edit documents shared via iCloud). Also, documents can be opened directly via iCloud Mail.
Other improvements include the Keynote presentation app which now lets you edit charts within imported files. The Numbers spreadsheet app has improved pop-up menus, while the Pages word processor has improved text wrapping, new templates, and like Keynote, the ability to edit charts from imported documents.
Microsoft's big three Office apps – Word, Excel, and PowerPoint – made their debut in the App Store for the iPad last week.