A tweet from @SonyXperia broke many hearts when it claimed that only Sony's premium Xperia Z line will get updated to Android 5.0 Lollipop. A Bluetooth certification labeled "Tianchi Update to L" shows this might not actually be the case.
"Tianchi" was the codename for the Sony Xperia T2 Ultra and "L" should be pretty easy to guess - until Google reveal the official treat, Android 5.0 was known just as "L."
The certification itself was granted on March 11 and the results listed a couple of days ago. Unfortunately, this is where the duties of the Bluetooth SIG end, there's no indication when the update may be released. This is subject to making sure the software works and collaborating with carriers to push out the update.
The Sony Xperia T2 Ultra launched on Android 4.3 Jelly Bean then got updated to 4.4.2 KitKat (and 4.4.3 after that).