I own a couple of toppers of this length and I wish I had more. Yes, I wear it indoors. I realized that the silhouette is already comfortable and familiar to me because of wearing a white coat at work.
It works as in the above examples with skinny pants, but it also looks good over a sheath or sack dress of a similar length (a bit shorter or longer). But currently I am particularly loving how it looks over flared pants. (This might or might not be a flashback to the knee length vest and wide leg pants I induced my mother to sew for me in high school in the 70s. If not for the fact that it was brown and my body is now 4 pregnancies larger, I would be mourning it still.)