I'm thrilled that they are doing this (as an option of course, so people can do as they please). These days, now that most applications are tabbed, Photoshop is the only application I use on a regular basis that uses the aging lose-window, fixed/floating tools design. When using photoshop and illustrator to work on the same graphic, I always found this annoying because it's too easy to switch to the wrong application. At a glance it's not always obvious, either layered or in expose, which window is which. I got leopard hoping to better separate my workspace using spaces, but of course cs3 doesn't work well with spaces.
I've never had these frustrations on windows, and still often prefer to use my pc laptop when working on large batches.
I also don't understand why people are saying this is such a horrible move from cs3 - it's basically the same as the "Maximized Screen Mode" (which many designers recommend for the neutral background), just sizable and movable, and with tabs to switch images.
As for the tool changes, I'll reserve judgment until I try them.
As always, personal preference, not saying it's "right". No need to flame me, I'm just voicing my support, and I know first hand that I'm not the only one to complain about this.
