I don't think games "need" blockchain. Nothing "needs" blockchain just like nothing "needs" the internet (humans survived a long time without it). That said, I think blockchain gaming will fundamentally change how we think about the value of gaming because of the provable scarcity of cryptographically secured digital assets. That may be too much jargon, but another way to say it would be you get to keep the things you earn in game, can transfer them to others, and even keep them if the company that started the game goes away but another company decides to honor the data on chain and keep the game going.
That, right there, is really valuable. Currently, people spend billions on centralized games which, if they go away, means all the value they earned there is gone too. Prospectors, for example, plans to run as a DAC which means giving token holders influence on the in-game mechanics and economics. That's huge! Steps like that will change gaming and how we interact with game designers. DACs are showing up everywhere, and I'm glad to be working with @eosDAC to help.
thanks for sharing.