I've installed and am using CS4 Production Premium, and let me just say it totally rocks.
I should note here that Adobe employees obviously have early access to our own pre-release bits at any point in the release cycle, so I would not infer from this posting when the bits would be publicly available, etc, just watch the Adobe web site for that. However, we did announce that Adobe Creative Suite 4 and its associated point products are scheduled to ship in "October 2020 with availability through Adobe Authorized Resellers and the Adobe Store" so -- there. :)
Now, I'm obviously a little biased here as an Adobe employee but as one small feature example, the new "Transcribe" option in CS4 which analyzes and transcribes audio tracks with spoken speech into actual text (stored in the metadata of the file), is absolutely, positively mind-blowing. You can actually search for text and jump to that exact point in the file where the word instances you are searching for were spoken. Using this to speed the production of multi-lingual subtitles on videos on DVD production, would be one real-world use for this. Just transcribe, review, translate and burn with multi-lingual subtitles on your videos. I'm lost for words.
The bits aren't yet available to the general public (coming soon), but you can check out the details on the Adobe site for now and I think you can pre-order but don't quote me on that:
All I can say is, Wow. Nice job guys.