Is Photoshop PS3 worth the upgrade for photo restoration?

Photoshop CS3 is here at last and has some exciting new features, but is there enough to upgrade for if you use Photoshop for photo restoration?The workflow features have been improved through the streamlining of palettes and self-sdjusting docks, but the workflow and interface in CS2 wasn't exactly clunky or intrusive to begin with.Adobe Bridge has been improved too ... big deal. Most people I know don't use it anyway. I find it useful, but not essential. Adobe say it is now faster, and yeah, it was kind of sluggish, but the improvements don't sound exactly mind blowing!One new feature that is really worth a closer look, and should have made it into Photoshop a long time ago in my opinion, is non-destructive smart filters. Up until now you could only apply image adjustments (eg. levels, brightness/contrast, invert, etc.) non-destructively. With CS3 you can now apply filters, say a gaussian blur, to an image or a layer with the option of coming back later and adjusting the blur settings or removing it completely. Whether this feature will be limited to certain colour modes or a limited number of the available filters remains to be seem.I am delighted to see a feature I have desired for ages, and that is rotated/scaled cloning. I've lost track of the number of times I've cursed it's absence. Wait and see, give it a year and you won't be able to live without it!The Healing Brush tools have been improved too, which is more good news for photo restorers. Changes to the Channel Mixer and extended options for creating black & white images from colour will have obvious uses too.I reserve judgement on whether it's worth the upgrade.