Just watched a long slide show of her photos on YouTube. Didn't want to comment before seeing more. Not really sure what to think. Very simple, basic composition, looking better because of square format which in my opinion is always easier. Given the number of frames she shot, you're bound to get some winners.
I think that most street photography from that period and from that area will nowadays look interesting and even special, but in her day it was, what phone photography is today.
Commercial success will depend on what New York art "elite" will decide. It's those people who decide if an artist becomes famous/collectible. A lot of people have made millions on Rothko and such, making them famous for their own gain. Probably the same will happen with VM, poor women who has no say in anything.
Whether she wanted or not, whether she deserves it or not, she is now famous.