So, what happened? A few things.
First, the CAQ fell apart in the past 24 hours. Voters thought "can I trust Legault and the CAQ with my vote? I don't really want to vote for Maoris and the PQ, or for Charest and the PLQ, but I don't know if I can trust Legault and the CAQ, humm" and decided "Naw, I can't trust em, they are just too unknown, worrysome, and untrustworthy."
Other voters remember the 2007 minority and seem to have gone to the PQ just to give someone a majority. A few voters even swung over to the PLQ.
In the end the result is clear, a stable PQ majority, with a stronger than expected result on the Island of Montreal, and in the 450 area around the city.
There is not much more I can say at this time that has not already been said.