I could see centering the running-window icons, but the Start button should still be in a corner. This is day 1 UX design stuff-- the corners are effectively i

I could see centering the running-window icons, but the Start button should still be in a corner. This is day 1 UX design stuff-- the corners are effectively infinitely large click targets, ensuring quick and reliable access. The Apple menu has been in a corner since 1984 for a reason.