Most of our pax (regional Vic and Tas - Australia) only really want to know when you're going to arrive (i.e. if we're late) and the local weather.
We get very few enquiries as to "What is that town/lake/river etc.".
Has this changed that much in the last 20 years? I remember many years ago PA's from the flight deck letting pax know about anything interesting en route.
HandyAndy, the difference over the past 20 years is that 20 years ago there wasn't the same level of IFE in the cabin. Today, there is much more to entertain the pax, and most of them regard Flight Deck announcements as a nuisance, IMHO.
My 2c
DIVOSH!