Tired of waiting for the OTA update so I did the USB update last night, instead. EU - eastern part. The update file downloaded form sony.co.uk site.
At the first glance, new menus design and better personalization options. PQ has slightly improved IMHO, watched TV digital HD chanels and HBO GO. On the minus side, the lag time that pass from pressing the menu button till it appears on screen has increase by a third of a second (or it is just me). Also, when the menu pops up it triggers a sudden increase in volume before it fades to mute. This lasts for 1-1,5 seconds. Before, when the menu did pop up the sound goes to mute instantly. When I power off the set, and the screen goes black, my AVR firstly goes to mute and then after 3 seconds turns off. Before the update, this took only one second without passing through mute.