nowadays, all the keyboards have a "windows" (or "apple") key.
on the other side most graphics programs (gimp, inkscape, scribus, ...) and some games use alt + mouse for some features.
for this reason, there should be an easy way to switch between the alt key and the windows key as a modifier for moving and resizing windows.
if possible, the default should be to use the windows key (almost only advanced users currently use the alt key to move the windows: they will find the new key or find how to switch back; beginners won't understand why the alt key does not work as it does on other setups).
thanks for caring