Another vote! Here's a link to an article on some background as to how the 'apps' function/behave and ownership.
Quote from article:
"Matt McRae, Vizio’s chief technology officer, took to AVSForum (where he maintains an active presence) to explain the revised user interface to the company’s most fervent users.
It would be wrong to think we are porting a bunch of native apps to the screen and doing an about-face on Cast. SmartCast TV is just SmartCast Mobile built for the 10ft experience. Meaning the UX is actually driven from the cloud and the same backend servers as SmartCast mobile. There is no native app running... which means we can add features, improve design, add content, etc without having to do an app or firmware update. Also, the apps "running" in the TV are actually cloud based HTML5 interfaces that also can be updated without downloads or firmware updates.
So these aren’t regular “apps” that you’d need to update through some TV app store. They’re HTML5 apps that the TV loads from the cloud; the streaming companies themselves have full control over pushing new features or other changes. McRae confirms as much in a later reply:
When Hulu wants to update their app they make a change on their server. Immediately all SmartCast displays will be updated since an "app launch" is basically just loading it from their server. They can update their app as often as they wish and you will always have the latest without having to download code to your display."