I was reading sonyalphaforum.com and there was a thread asking how to change the units of the distance to subject from meters to feet when manually focusing. That is a high class problem I didn't know that distance was provided at all. I then tried to figure out where to see the reading. After googling around, nothing was obvious. I picked up the camera and went into manual focus. While looking through the viewvinder a pop-up scale appeared,-sure enough with the distance. Amazing! Same thing happens on the LCD. This can be very useful when I want to focus at a particular distance,-typically the hyperfocal distance. Kudos to Sony!
Update May23, 2016
I tried this with my Zeiss Loxia 35 mm and it didn't work. So it seems it only works with native Sony lenses.