@Lorna170
If you take your own photos, then of course this makes sense.
However, most of my photos were taken by professionals and I don't want to replace them with my own, inferior photos every time I make a small change. I certainly couldn't afford to hire a photographer every time I do!
I've changed so many things (including the coffee table and TV) since my photos were taken - too many to list really - and not a single guest has mentioned any of them. I honestly don't think most people are that observant. Several have commented that the house looks nicer than the photos, but I am not sure if they know why. Sometimes its good to undersell and overdeliver!
The only time I thought it was important to add new photos was when I changed a bed. I think a large sofa would also be a good example.
Of course, I do think it depends a lot on the listing, including the size of the space and the number of things in it. Plus, if you are changing the look and feel of a room with the new furniture or changing a lot of things at the same time. Basically, how radical are the changes? And, for sure, if we're talking about a big upgrade or a lot of upgrades, it's worth showing them off!