Anyone else ever wanted multiple cursors and multiple mice on one computer? Sometimes I'd rather move my hand to a different mouse than drag the cursor across all that screen real estate. Also the different pointers would stay put when not in use.
Basically manual static acceleration for those that hate automatic smooth acceleration but want to occasional move fast easily.
Alternatively if you're lucky enough to have reasonably steady hands you'd be surprised what you can get used to as a default static speed. My multi-monitor setup is over 70 inches horizontally but I can get across it in a flick or still move pixel by pixel if I want.