This thread is probably why we don't get demos anymore.
The hype around building a game up is to make people want to play the game. Make people need to play this amazing game that they have seen videos of, read reviews, previews, live stage demos, etc.
They could also try to innovate in the gameplay department, They are doing this massive multi million dollar productions that really do nothing but incorporate carrot on a stick game design.
I bet some people will enjoy it greatly, and that is fine... Personally I'm currently having more fun with Spelunky than the one I had with the Destiny beta.
I'm dissapointing so far next gen just feels like a slighly upgrade version of last gen, no innovation, no risk, nothing exiting really.