It was a division of The Walt Disney Company that focused on creating and publishing video games, interactive entertainment, and digital media.
So, it's not a question of being established, but rather its history and closure.
If you're interested in learning more about Disney's current gaming ventures, you could look into:
* Disney Interactive (a separate entity from the Studios division)
* Disney's recent acquisition of Zynga
* The upcoming Star Wars and Marvel games being developed by Disney.