I'm not underwhelmed by these. Some of them looked very good, particularly the startup that uses facial recognition in videos.
I also agree that "large things start small", but which of these companies do you think really have potential to create enormous value for millions of people?
ZocDoc? Zivity?
I'm just playing devil's advocate here...I hope some of these companies really knock it out of the park, but the roster is a little "underwhelming" on paper.
My point though is that important products often appear minor or niche as first.