Why do I have the impression that it is starting to be kind of a website-promoting website for the web 2.0?
You see, a bare web service that wouldn’t get otherwise very well known, not very rarely gets hundreds of users once it publishes an app for that service on the Chrome Web Store. Even if the app is nothing more than a link to the website of the web service, it doesn’t matter: as long is the web service is of good quality, it’ll get popular amongst Google Chrome users in a way it would never be as a normal website showing up on Google results.
If these guys doing website optimizations to get more visits aren’t still using the Chrome Web Store as a way to promote websites, they should. At the end, nowadays calling “app” to a website acts as an huge upgrade to that website.