I just booted QtonPi image. Everything seems ok but my QtCreator installation is probably too old for Qt5, because I get a ton of "skipping incompatible" errors.

UPDATE: After updating qtcreator and

sudo apt-get install libmpc2:i386

on my Precice x64, hello compiles but fails to run because tar is not installed on the pi.

I was expecting a full develop-on-device image with X and QtCreator and one click to run hello world, but I understand this is not the case.
My only proposal taking into consideration the nature of the image as a target only is that it should be a less-step procedure for installation.

For example tar should be installed by default on the pi, and networking should be already enabled. I will play a bit with it and report back.