Image by andysternberg via FlickrCC BY-NC-SAI wrote before, that's the thing that will replace my laptop. I sounded weird. That's me :). Here you can see the official video-ad from Google, that gives you a very short hint of what this all means.
It's not a computer, it's not a laptop, it's the web in a computer-like object. That's the core of it. But watch it for yourself, and see the possible future of mobile computing working. It's definitely my future of doing things. I waited for such a thing for a long, long time.