Startup Idea : Apps that host apps, and allow sharing

i want to have an apps(cloud) where we can host all apps we downloaded(cloud)..like spotify where u can see what ur friends are listening, this apps allow you to peek on what apps ur frenz have and all sorts of happy and cool apps reviewing social activity can be conducted alltogether...can be named iPeek( for picking apps to host, and for peeking others apps)..huhu..Good?Bad? vote!!