It's a little frustrating knowing you have to wait a WHOLE YEAR for the 5.0 Android 'L' update
But yeah, it's for sure the last update this device gets as our device will go 18 months in September 2015.
If I got my math right, we should get the update sometime around this time next year; May-June 2015, since it took almost the same for KitKat. Or it may release as early as Feb-March. The one main reason the developer preview for Android L is already out, so Sony and other OEMs will start working on making firmwares even faster. So let's hope for the best, people.