I am excited for Traits because they solve a common issue when developing extensions for the Magento ecommerce platform. The problem occurs when extensions add functionality to a core class (like say the User model) by extending it. This is done by pointing the Zend autoloader (via a XML config file) to use the User model from the extension, and have that new model extend the core model. (example) But what if two extensions override the same model? You get a "race condition" and only one is loaded.
The solution right now is to edit the extensions so one extends the other's model override class in a chain, and then set the extension configuration to load them in the correct order so the inheritance chain works.
This system frequently causes errors, and when installing new extensions it's necessary to check for conflicts and edit extensions. This is a pain, and breaks the upgrade process.
I think using Traits would be a good way to accomplish the same thing without this annoying model override "race condition". Granted there could still be conflicts if multiple Traits implement methods with the same names, but I would imagine something like a simple namespace convention could solve this for the most part.
TL;DR I think Traits could be useful for creating extensions/modules/plugins for large PHP software packages like Magento.
