Yes, you can use it to expose your key features in unified way the user will understand. You can use it to tie different sites or pages together. Think of apps like "Super Bookmarks" that contain more than one URL.
While we don't have payments in place yet this explains what our long term goal is. We are web app developers. We understand the problems with finding an audience for our services.
"The web has been plagued with required forms fields when signing up for websites, apps and services. While auto-fill is helpful it hasn't made the process of signing up for services any easier. Smart Bar apps provide us with a 1-click process for adding an app to your browser. When we combine this with an API for developers to integrate their "Best Offer" with subscription services we can provide a 1-click sign-up and subscription management just like you can with other software."
My name is Kevin and I am the designer behind Raven. We believe there is a better way to discover and interact with web apps. That browsers could do a better job. At this moment we may not have the exact receipe right but we'll get there with time and iteration. The dream is that we will all someday have a centralized place to find web-based solutions and reduce the friction of signing up for them.
Google needs to focus on their core competency which is search. Instead of competing with everyone they should find ways to integrate their search engine into everything. It boggles my mind we don't integrate Google search into everything like we do with the Twitter API. If they continually strive for second place in every category they may one day find themselves second in search as well. Wave is just another lesson in the long string of failures they will continue to produced until they get back to what made them great in the first place.