WS7.1とPlayer3.1来たね

Release highlights include:
  - OpenGL 2.1 for Windows 7 and Vista guests
  - Overall graphics performance improvements
  - 8-way SMP
  - 2TB virtual disks
  - OVF 1.0 support
  - Icons to launch applications in Unity
  - Automatic software updates
  - Fedora 12 guest support

VGA廻りの強化が主なのかな・・？