I've been getting the same feeling lately. There are definitely a handful of companies in this batch that are solving real problems, but I can't help but feel the majority of them are not true value-ads in a world where real problems exist.
Industrial safety inspections done by robots and affordable, modern zero-energy homes are the kind of difficult real world problems that will make the world a better place when solved.
On the other hand, I don't know if glass-by-glass wine delivery or another college social network are solutions to real "problems" that needed to be solved.
Now of course, it's still early for a lot of these startups and I can be proven wrong. But the potential impact of a something like a smart oven with a companion subscription meal service seems really small compared to an idea like a marketplace for farmers in India to sell directly to institutional buyers