Wow. This is excellent news. It takes a brave leader to move away from an immoral but mostly successful business model to one that is moral but new and risky. But I have the confidence that SeaWorld's leaders will be very successful on this new route. And for the first time in a long long time, I am rooting for SeaWorld to succeed. Because they made the right decision. This is a cause to celebrate, not because of victory over the villain, but becuase the villain is changing.
Though they're still in captivity, this will be much better for the animals. The breeding process was very unnatural, and very disgusting and painful to see. And training and having them perform in shows is just extremely poor behavior. Using animals as performers without the animals' consent is just inhumane. To those people complaining that "oh well it's too bad my kids won't be able to see it, it was so fun to watch, etc," well, please look at it from the whales' perspective.
It sounds like they eventually plan to phase out other animals as well (hopefully dolphins soon). I do understand the one-at-a-time approach. If they got rid of all of their animal shows today, their business would take a huge hit. What they need to do is accompany for each perceived "loss" that this freeing of the animals creates by adding something else in replacement. That will take years, but it is happening and it's going in the right direction.
In summary, instead of ignoring and denying their problems like they have in the past, SeaWorld is facing reality and taking moral action. Joel Manby sounds like he really understands what he's saying and why this is the right thing, and to be honest, I'm starting to like the guy. I hope they not only go through with this, but also keep progressing down this road in the coming years.