There is an option called “Screen Distance Offset” in Virtual Cinema mode which does exactly that. If you want the screen *really* close, make sure to use the “Ambience” or “None” scene. Those allow for a wider range when adjusting the distance.
Loosely related: Virtual Cinema mode has a nifty magnifier window that can be opened with a click on the mousewheel. Extremely useful for reading small text in the desktop viewer. [SHIFT][MOUSEWHEEL] changes the magnification factor while it’s open.