On the Nokia Web page they say Living Image are just for 1520/930/Icon.
For sure they need more power to process those thing.
Maybe in futuure Living Image will come for other phone (920,925,1020,ecc)
Let me tell something,these so called LIVING IMAGES are nothing but little modified .GIFS. Sure there are two extra files when you take a pic as living image but its a GIF nothing more JUST LIKE CINEMAGRAPH. This app doesn't need horsepower so they are just blocking it for old devices. My 1020 was capable and is capable of capturing them and NO,there is delay in shot,no extra time is taken too! So this is done on purpose heck I even took ~25 photos with it and nothing happened eg crash,hang,freeze etc.
Also even though this feature might not come (I HOPE IT SHOULD AND IT WILL) can you tell then why do CONTINUOUS AUTOFOCUS needs extra horsepower??
This autofocus has nothing to do with S800. Even the Galaxy s3 which has same specs as 920 possesses this feature. Even in video mode,the lumias has continuous autofoucs so I don't see why you need SO CALLED MORE HORSEPOWER! This is all BS and I hope it doesn't stay like this as I really want both of these features!