My primary machine runs Arch Linux, a distro that switched the /usr/bin/python link to python3 some months ago, thus generating a sort of "majority Python 3" environment. I myself, having been rather apathetic on the switchover before, have switched completely to Python 3 just because using Python 2.x has become a hassle.
Admittedly, I am in the fortunate position that all my active python projects could be moved over easily, once boost-python and matplotlib were solidly 3-ready. Other libaries are more problematic (looking at you, every Django-plugin out there).
My point is, Python 2 won't be good enough for long and for some of us it already isn't any more.
