The open beta will be available for players live in United States, Canada and Australia. However, Nexon hasn't announced the new contents for OBT, but normally, there will be new level cap, new dungeons, and new weapon/armors, and things like that.
Dragon Nest just ran a 5-day closed beta in mid-June and will step into OBT. It seems that Nexon's long time preparation for the game does help to ensure the quality. There are still bugs, as the developer reveals in the CBT recap, but they are striving to make the game even better with the help of community feedback.
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