According to John Nack, Photoshop’s Principal Product Manager, all Adobe CS5 applications will be fully 64-bit on OSX! There will not doubt be tons of new features but I’m very impressed with what will go into Photoshop as you can see from this technology demo:

And Adobe will finally kill their incredibly hostile installers and use Apple’s robust PKG format. To add icing on the cake, the licensing errors that many people faced is due for a change as well. With CS5, product licensing will not stop the application from launching and will display a serial number re-entry interface.

The product suite is slated to be released in April 2010.