I've been playing with it just to use Google Earth and, despite the experimental tag currently applied to this feature, I'm really pleased that the enabling this feature produces a notable improvement on the performances of Google Earth in OpenGL mode. My workstation is pretty powerful but working with such software without 3D acceleration was a pain. I suppose that whoever needs OpenGL acceleration in an application running in a VirtualBox host would be very pleased of this new feature.
According to the user guide (pag. 67), the current experimental implementation has the following limitations:
- It is only available in Windows XP and 32-bit Vista guests with the Windows Guest Additions installed.
- Only OpenGL acceleration is presently available in those guests; Direct3D is not yet supported and will be added in a future release.
- Because the feature is experimental at this time, it is disabled by default and must be manually enabled in the VM settings.