"Computing Power in the Cloud

EC2 servers have massive computational power. On EC2, available CPU, storage, and available memory can be orders of magnitudes larger than on mobile devices. Silk uses the power and speed of the EC2 server fleet to retrieve all of the components of a website simultaneously, and delivers them to Kindle Fire in a single, fast stream. Transferring computing-intensive tasks to EC2 helps to conserve your Kindle Fire battery life."

http://www.amazon.com/gp/product/B0051VVOB2#silk

What does this mean? "Transferring computing-intensive tasks to EC2 helps to conserve your Kindle Fire battery life". Are we offloading javascripting processing to the cloud and returning the results?

If so it will be different than Opera Mini.