I see they are much better than I initially thought.
Basically because I don't really see those manipulations usually exists on every Android devices I saw so far...

Usually photos have blur effect applied and then sharpened in order to eliminate the noise at sensor level and it makes a strange output if you see those photos closer - they have much less details because of this trick.

So maybe this trick is not applied here or it is at way lower level which is absolutely a good point.
Also, I don't see much noise in these photos, but it will definitively different in photos taken in low light.

...and yes, it may be improved in later updates or some filter settings may be turned on or off - I rather would like to see photos without the trick mentioned above as I may do modifications myself if I would like to and that way I have a more detailed photo.