Several new Ultrabooks that do not bear Intel graphics will soon be available in the market. This distinction is important because by definition, an Ultrabook is a thin and lightweight laptop that runs on an Intel central processing unit. The name “Ultrabook” itself has been trademarked to include the Intel specification. The graphics, however, do not necessarily have to be by Intel.
via Several Ultrabooks to Carry Next-Gen NVIDIA Kepler Graphics | Eee PC.