Well the reason you might want to use this is there are LCD monitors that swivel nicely so you can have a different aspect. This is good for some applications. I have set something like this up for people that monitor stocks. They turn monitors on their side with these swivels to get a longer screen to fit more content while still keeping the resolution legible. Oh and with my drivers this doesn't work but the hotkeys are configurable to change this or I can go to the nvidia control panel to change it there.