For a period of about half an hour last night, Apple's Built-in Apps page previewed new iOS 7-inspired icons for the iLife and iWork apps. The icons aren't surprising as a few of them were leaked last week, but this change is: GarageBand will be a free download for all iOS 7-compatible devices:
GarageBand is free on the App Store for all iOS 7 compatible devices; additional GarageBand instruments and sounds are available with an in-app purchase. iPhoto, iMovie, Pages, Numbers, and Keynote are free on the App Store for qualifying iOS 7 compatible devices activated on or after September 1, 2013.
As the text notes, the free GarageBand is slightly different than the free iPhoto, iMovie, Pages, Numbers and Keynote, as those app require you to purchase a new iOS 7 device. GarageBand will be free on any device -- even old ones -- that can run iOS 7. It will also offer in-app purchases, unlike Apple's other iLife and iWork apps.
It's highly likely that the new iWork and iLife apps will become available shortly after Apple's event tomorrow.