There is another part of 1st Day keynote. That is Chrome Web Store. The concept is fairly simple. An appstore for Chrome web browser. You can install or buy web app in through the store. Just one click you can install the application in a tab page in Chrome web browser. Even for paid apps, it can process within a click too.
Moreover, it supports the most of modren web technologies, such as Flash.

But I got a question, for paid apps, whether the developers can only use Google Checkout to be their payment processor. If that is the case, it has the problems in Android Market. Only developers from limited locations can sell their apps, becuase Google Checkout is only available in very very limited locations!

Lastly, the web store is only web applications only, it can't sell the desktop applications.