My Nexus 5 updated to version 4.4.3 when I was in Tel Aviv at the beginning of the month. So, I was a bit surprised to see that another one was available today. I read this is mainly a security fix for the problems recently found in OpenSSL. It is related to the, you know, Heartbleed bug you heard so much about on the news.
I love seeing the little, green Android with his gears hanging out during an installation. I probably didn't need to push the button to upgrade while sitting in the hot tub. It most likely would have been something which could've waited until I was back in the apartment.