The Chrome store could be more than a link directory, and if that happens it'll be for the same reason Apple's App Store took off: centralized payment. A sane payment system for web apps could be revolutionary, but before that happens we'll need to change the Web's culture. Right now people simply don't pay for web content.

The ability for the Chrome store to deliver local apps, which I suspect you were referring to, is mostly unused and irrelevant. HTML5's offline features can duplicate that functionality on any browser that supports them.