John Gruber writing at Daring Fireball:

This is a fundamentally different vision for the coming decade than Google’s. In both cases, your data is in the cloud, and you can access it from anywhere with a network connection. But Google’s vision is about software you run in a web browser. Apple’s is about native apps you run on devices. Apple is as committed to native apps — on the desktop, tablet, and handheld — as it has ever been. Google’s frame is the browser window. Apple’s frame is the screen. That’s what we’ll remember about today’s keynote ten years from now. I think John has the best "big picture" take on yesterday's announcements.