Some more on the tablet/smartphone functionality for Metal Gear Solid V: Ground Zeroes: first of all, Kojima tweeted another photo explaining how you can use the touch screen to navigate the map.
“By taking iDroid on tablet/smartphone out, you can pitch/slide by finger.”
According to Ken-ichiro Imaizumi, senior producer at Kojima Productions, this is very helpful. When asked if the PlayStation versions will support these devices as well, he confirmed it will be in all versions.
Source: Hideo Kojima Twitter, Ken-ichiro Imaizumi Twitter