Many of the included apps (like NYTimes, Amazon, etc.) have Chrome Web Store apps that are separate from their regular websites. (Of course, it's debatable whether these app versions are preferable to their standard website counterparts.) The Web Store team emphasized to us the discovery aspect of the store. They also seem to be pushing Chrome Web Store payments as a way to increase paid conversions through one-click purchases from users who need only enter their CC details once.
So isn't it like all Cappuccino Apps could be in the Web Store right away? Does the Web Store make them that much different? (I do see that PicsEngine integrates single sign-on with a Google account, but this is relatively minor in my opinion)