This new integration of Office with browser will offer it’s users a seamless, synchronized experience across the devices that they use to work smarter, faster, and better. Office Web applications will make that a reality. Microsoft will offer this service with ad funded and as a subscription based service. Business customers will use these services as a hosted subscription service and through existing volume licensing agreements. Microsoft will show a private technology preview of the Office Web applications later this year. The pricing model hasn’t been announced yet.