Oops. They did it again.
It hit the market during the last few weeks. Last generation of Intel Atoms: CedarView (D2300, D2500, D2550, D2600, D2700) and Cedar Trail (N2600, N2700, N2800) SoCs integrate a PowerVR GPU from Imagination instead of the usual Intel GPU. If you remember the Poulsbo fiasco, it's the same. More or less.
An unsupported graphic card on Linux distributions, and which can't properly support a basic desktop environnment like Unity or Gnome 3.
To prevent this issue, Intel woke up MeeGo from the dead in last february [to add support for CedarView]