The entire marketcap for gaming is apparently under 200 billion dollars. The marketcap for social is dramatically larger & (D)PoS is the future of social (don't you agree?).
Hive is a lot of things, but insofar as Hive is social, it'll need to create a quality platform. If it doesn't, ETH2 sure will.
I agree, the social aspect of Hive has more potential to be huge. The key might not necessarily be quality. I think it has more to with what's popular. For example, that could be sharing cartoon drawings of a comic cat. I think having communities, tribes, and different DApps can make it easier for people to focus on what they really enjoy. I tend to write long posts but that's not for everyone. Therefore, my content might be more suited to a DApp focused on elaborate content.