WRONG! There are new Bravia engine files which have differences in them. Image processing does not merge with an app. It is seperate from the app. The app only allows and enables the processing to happen.
Just having new albums, it will still activate BE instead. You need the new files which are for X-reality to load X-reality obviously...
Swiped from my Xperia Z (C6603)
hmm, i don't know why but i have flashed 4.1.2 (use flash tool with wipe everthing) then updated 4.2.2 by sony pc companion, and i just putted honami album app in my system/app and x reality worked on my phone .....