As far as Bangkok goes my wife is always telling me this place or that used to be a rice field. Lots of that transition occurred between 10 and 20 years ago but it's still going on now.
Of course it's not really the point of the thread about Bangkok putting in even more malls and condos.
I've only been here just under 6 years so I can't reference back the whole 10, and it all seems about the same as when I arrived, and I don't have much to offer about other places.
I first went to Laos 5 years ago and it's probably changed in similar ways but I've not been back for a couple years now.