The thing that jumps out at me about HTTP/2: even if your browser can send N parallel requests for different entities, you're still making N database queries and incurring N request overheads.

This means that every layer of your stack has to be reorganized and optimized around HTTP/2 traffic patterns...or you can just batch requests as before, and save that overhead. It makes me think that the N entities problem isn't actually the most promising use case for HTTP/2...