The last Google Toolbar PageRank Update was in February 2013 and it seems there will be no update this year.
Since then there has been no comment about it from Google, only yesterday Matt Cutts, Google webspam head, answered to a tweet by Niels Bosch:
@NielsBoschh I would be surprised if that happened.
— Matt Cutts (@mattcutts) October 6, 2013
Also there’s a video on the same topic, watch it on YouTube.
Those who are still waiting for the PageRank update, should probably forget about it, at least until 2014.