I think what's missing in this thread, and, perhaps, what Arthurwg is alluding to, is the social and political comment that was an essential part of that first wave of "New Topography" photographers.
Ingrained in the esthetics of the "movement"—actually more a coincidence of people working on the same thing at the same time—was a critique of the American Dream, which had shifted its focus from the east in the 19th Century to expansion in the American West in the early 20th Century, and which manifested itself in an aggressive "taking over" of the territory: boomtowns, tract houses, highways, exploitation of natural resources, airports (the ultimate metaphor for the idea that there are no longer any "frontiers"), ever-expanding suburbia, industrial development replacing agriculture, etc.
"New Topography" was about witnessing a slow disaster taking place, about the end of natural wilderness being replaced by "man-made wilderness." It was about documenting (hence the use of the word "topography"), in a very unsentimental way, this new "man-altered" landscape by showing
both the landscape and its "alteration", metaphorically (as when Robert Adams pushes the mountains in the background) when not directly.
That what is now seen as "new topographics" has evolved into "everyday landscapes" in which more often then not only man-made constructions are shown, without any or few visual reference to what has been "altered," how it is altered, and the tension between the two, is a interesting, albeit puzzling development. Another bizarre aspect is that we often see labeled as "new topographics" photographs of older, at times abandoned structures (an old diner, gas station, etc.), while the original "new topographics" were shooting new structures, such as Lewis Baltz and Robert Adams' tract houses.
What's fascinating about these facts is that while today's "new topographics" has little to do with the original "new topographics" photographers, it is a throwback to a much further temporal and esthetic reference: Walker Evans' "lyrical documentary" style.
FWIW, I read Arthurwg's post as recommending that people "look at the catalog and read the text".
In fact, I tried to find some of the catalog on the Internet for just that purpose.
There is a lot written about the New Topographics exhibition. In most writing that I have seen, the common theme is that the exhibition evidenced an important evolution in landscape photography that was happening at the time - organically and in a not particularly organized and systemic way. In essence, the exhibition showed what was happening all on its own.