I took advantage of Windows offer to upgrade to version 8 (64) from version 7 (64). Works fine with Photoshop but I have found some subtle differences: I was able to take a photo with more than 1600 pixels to a side and run Pixel Bender on it. Now it won't run and gives me a message that "the image dimensions exceed the hardware capabilities of your GPU". I found it works when I reduce the size by 1/3.
I use two monitors, left one for Photoshop, right for e-mail etc. I use minibridge to select files and have it on the bottom of the left screen. When I go from the right screen to minibridge the Ps icon in the tray has a yellow box around it. Click on the icon and can work in minibridge again. Used to double click in minibridge and get back to work.
I'm sure others will find other features.
