Ubuntu is currently having their semi-annual developer summit and will be discussing their new AppCenter tomorrow. There is a rumor/total guess that this AppCenter will also integrate with an Ubuntu AppStore secretly in development.
I honestly hope this rumor/total guess is true. There is a large demographic of people who would be benefited by this. This would help Linux adoption among such people. Second, it would be a great source of revenue for Canonical which would also be great for Ubuntu.
Not that my vote matters to anyone, but I hope it happens.