Interesting. One thing that I hate when using Emacs on Windows in that
M-Tab open some auxiliary Windows dialog with running programs rather than
e.g. completion-at-point. It would be *very* welcomed if one could let
Emacs take over these key inputs.
This is already possible, via w32-register-hot-key, see the node
"Windows Keyboard" in the Emacs manual. (However, I think someone
reported that w32-register-hot-key doesn't work on latest Windows
versions, due to some change in how Windows handles that.)