Many issues are too complex to be reduced to a sound bite. I worry that we will lose the ability to do deep thinking if we get addicted to constant interruption by the beeps of our seductive electronic devices.
Working memory is our ability to process information. We use it to ace the unexpected interview question, to improvise when we leave the notes to our dinner speech at home, and to play in the Super Bowl (well, a few of us, anyway).
While it's true that many prodigies receive support, resources, and encouragement from parents and coaches early on, their support is typically the result of a demonstrated "rage to learn." The reason why they are so driven to deliberately practice in their domain requires explaining.
Working memory capacity is the amount of information that people can hold in mind at once. All of us have a relatively limited amount of information we can think about at any one time, but there are differences between people in the size of working memory.