"The launch of the 2.3 software for X10 is getting closer, and the planned release date is approx. w30. The date could still be changed, since the launch is depending on operators approval. The software will be rolled out continuously, just like the earlier 2.1 release. The exact launch date is depending on market and operators approval, so it will unfortunately not be possible to give precise information on launch dates for each market/operator. You will get more information once the roll out has started."
Week 30 of the year is actually this week, so some places might see the update rolling to their Sony Ericsson Xperia X10 handsets that are not bound by some carrier's shackles. Some of the camera UI functions were initially being dumped with the update, but Sony Ericsson's developers have put extra efforts to remedy this, and also embed the UI mostly as we see it on the Xperia arc, for example:
"The UI with the desktop layout and pinch-to-overview gesture will be similar and Gingerbread features like Wi-Fi & USB tethering, App storage on SD-card etc are included. Also the customizable horizontal app tray and the media experience widgets from the 2011 XperiaTM Products are in, including an integrated equalizer in the music player. Of course also apps that require Android versions 2.2 or 2.3 will now be possible to download from Android Market, e.g. Adobe flash.
One difference compared to the 2011 products is that DLNA will not be included. Extra type approvals were needed for that and we were unable to prioritize that without jeopardizing the time schedule. There are both server and client alternatives downloadable from Android market though."
The Facebook Inside Xperia integration will also grace the screens of those generic Sony Ericsson Xperia X10 trade kits that get the update first, and the company has even recorded a video preview of what the update will look like on the phone, which you can see below.
source: SonyEricsson & AndroidCentral