I dropped into the local Apple store and tried out the new Magic Mouse, connected to one of the new iMacs (27″).Positively, the finger gesturing works well. Finger down to scroll; left-right to move within a window (web browser, Word document). But I (mistakenly) thought I could move around the screen via finger gestures. (Perhaps you can; I couldn’t figure out how.) I ended up using the mouse to move around the screen, and to move windows within the screen. For example, using two fingers (or other combination) to move current window left/right/up/down; using pinching motion to enlarge/reduce current window? In this sense, Magic Mouse is no game changer. Having to shift the mouse around with my whole hand isn’t saving me any time. I might as well save $50 and stick with my Logitech cross-platform USB wireless with familiar left/right click button and scroll wheel. We’re almost there, and Apple will probably get there first. But the Magic Mouse ain’t it, not yet.