This morning Simon Hayhurst from Adobe’s video group announced that the next versions of Adobe After Effects & Premiere Pro will be 64-bit native & will require a 64-bit system to run (meaning a 64-bit processor and operating system). See Simon’s post, as well as this one from AE PM Michael Coleman, for more details.
If you’re running these apps today on a Mac, you’re probably already set (as CS4 is Intel-only). The only 32-bit Intel Macs were the first-gen MacBook Pros, iMacs, and Mac minis. On the Windows side, chances are again good that you’re running on a 64-bit processor, but you’ll want to make sure to move to a 64-bit version of Vista or Windows 7 if you haven’t done so already.
Does this news mean that the next version of Photoshop will carry the same requirements? No. Photoshop.next will still support 32-bit operating systems and processors (alongside 64-bit ones). It’ll be nice to go 64-bit-only someday (just so that we can focus all our development and testing time on this setup), but Photoshop’s user base is diverse, and the time isn’t quite right. In the meantime, supporting both flavors doesn’t compromise Photoshop.