Besides performance and quota changes, Google BigQuery adds support for importing JSON data and nested/repeated fields:
If you’re using App Engine Datastore or other NoSQL databases, it’s likely you’re taking advantage of nested and repeated data in your data model. For example, a customer data entity might have multiple accounts, each storing a list of invoices. Now, instead of having to flatten that data, you can keep your data in a hierarchical format when you import to BigQuery.
Original title and link: Google BigQuery Adds Support for JSON Import and Hierarchical Data ( ©myNoSQL)