Hi,
I just released a new product called Infinite Scroller 2D for Unity.
The infinite scroller can be used to loop the 'background' so that the world looks infinite. Our game Defenstar used a similar system. It does not move the Unity camera but instead move the objects trough the scene. This is a great alternative scroll system.
You can get it
hereThanks!
Defenstar (I have all the parts to recreate this beauty in Unity now)