Canonical has announced that Ubuntu 13.04 will be available with a GNOME interface, pleasing many users who found that the Unity interface didn't work well on older hardware. Other users, such as myself, found the Unity interface to be terribly designed and not easy to work.
This will be the first version of Ubuntu to feature GNOME as an interface since version 11.04. The version of Ubuntu, known as Ubuntu GNOME, has been around as an independent project since last year. Just because Canonical is offering up GNOME as an interface choice doesn't mean that Unity is gone.
Canonical still has high hopes for a unified Ubuntu across all devices, as its show with Ubuntu Mobile and Ubuntu Tablet.