I added that thing to my homescreen and played it as an "app" for weeks. The only problem is 2048 gets really boring once you have a framework for how to do it. It's nice to see the background of how he was feeling during that time. The (relatively muted) outcry of "derivative" never felt fair to me. His game is more fun to play than Threes. Millions of people agree.
It's funny that you say that 2048 "gets really boring" after a while, but that it is "more fun to play than Threes". It's interesting that the balance and effort that went into Threes resulted in a game that (to me) is more complex and possesses more staying power. However, it is still regarded as not as good as a game with more immediate gratification and significantly less staying power. edit: for clarification.
You have summed up the entire game industry in a nutshell.