If you use the video out capabilities with the VGA adapter and hook it up to a larger desktop monitor, does it always show what's on the screen? Or only works watching movies or presenting Keynote? My thought is: if you used the iPad and a larger screen for better 'real estate' you could use this at your desk as an controller (keyboard/mouse/touchscreen). For instance, if you wanted to build something in Pages/Keynote, but wanted a large view as you built it (using a larger, external monitor). Thoughts??