Something I was thinking lately is whether Microsoft copied an idea from magic workbench for their Windows7!? In this programs can be started from BIG icons on the taskbar. This is very similar to Magic Workbench; http://www.sasg.com/pic/mwb_preview.gif
However I am not sure if maybe this idea was copied from somewhere else before!?
NEXTSTEP operating system, 1986
Arthur operating system, 1987
Apple got their dock thru NEXTSTEP btw ;-)