More content and apps is the main ingredients needed to make Apple TV a main stream device. Apple is already adding more content, but has a ways to go. Apps as channels would be awesome!
I have several Apple products (iPhones, iPad, iMac, Mac mini, iPods and Apple TV) and they do play well together. For instance, iTunes seamlessly manages our iPhones, my iPad and iPods. The iMac and Mac mini can use screen sharing and Air Drop. The iOS devices and the Macs can use AirPlay to...
The iPad 2 also has a huge security flaw that allow people to bypass the passcode with a smart cover?
http://ipadhelp.com/ipad-news/ipad-2-smart-cover-security-flaw/
It's almost certain that Apple will allow apps on Apple TV. The only question is when. I think Apple will make the announcement along with the iPhone 5 in October.
Here is a developer that's already getting a head start.
Developer is working on apps for Apple TV | iOS TV