I just watched the stream as well. Some interesting changes coming.
The big new thing is the introduction of "Seasons". Each Season will span 3 updates. So the first Season will be with Update 60, 61 and 62. One good thing they are doing, with the introduction of Season, is removing the Happiness meter and the depletion of Happiness over time. Now you will accumulate Happiness during each Season. As you accumulate Happiness, you will unlock various rewards (e.g. magic, gems, costumes and characters). You can accumulate Happiness by completing Daily, Weekly and Event tasks. Most of the Daily and Weekly tasks seem to be similar to what players already due (e.g. send out parades, collect from attractions/concessions, etc.). As for the rewards you can earn, there will be free ones available at each level. But you can purchase the Kingdom Pass that will give you a higher level of award to earn, along with the free ones. I play FarmVille 3 that uses the same concept. The Kingdom Pass, at least from the video, seems pretty steep at $19.99. But given that it lasts roughly 3 months, that may not be all that much.
With update 60, there will be two new permanent Rescuer's characters - Penny and Miss Bianca. There was no indication if either of them were premium and would cost $ or gems. There were two Up characters as well - Dug and Charles Muntz. Dug will be a free reward for the new Season. Charles Muntz will be available if you purchase the Kingdom Pass and reach its appropriate reward level. FYI, you can use gems to move up the reward levels.
Two new attractions and some benches are being introduced. The Madam Medusa Riverboat (12x10) and Paradise Falls (10x10) are the new attractions. There is also going to be a Socks Plush Concession (5x5) to showcase the recent Buzz Lightyear movie. FYI, the Socks Concession is cute. There was no mention of any new land.
Next there is a Tower event starting on July 14th. The second chapter will begin on July 19th. The third chapter will start on July 24th, with the Tower event ending on July 29th. This is the Lion King Tower Event, with Scar being the big character reward. Chapter 1 you can also get Nani (Lilo & Stitch). Chapter 2 has Hiro (Big Hero 6). Chapter 3 has Mad Hatter (Alice in Wonderland).
One last item that was introduced was the concept of Time Skip Tokens. Basically you can use these to shorten the time to it takes for the characters to do their tasks. Each token will shave off 10 minutes. Definitely look at the Patch notes to learn more about this. They indicated the Patch Notes should be available on their website now. Just checked and they are there right now.
You can download Update 60 starting on July 12th.