Besides being able to show off Gallium3D on Genode OS (if using Intel graphics!) there are demos included for also showing off the Qt4/WebKit support, improved software integration, and then how even as a browser-plugin to virtualize the Linux kernel booting. The Genode OS LiveCD can be run on native x86 hardware or via virtualization with either QEMU/KVM or VirtualBox. The Genode 2010-11 ISO is just 221MB in size.
While Genode OS has a working Gallium3D implementation, for now you're limited to using it with older Intel GMA graphics hardware that is supported by its i915g driver. There's actually better Gallium3D drivers for ATI Radeon and NVIDIA (via Nouveau) graphics hardware compared to Intel's Gallium3D driver that isn't even maintained or done officially by Intel, but alas there's no Genode support there at this time. It's likely due to the TTM memory manager needing a Genode port for the Radeon/Nouveau drivers to work instead of just the Graphics Execution Manager with Intel hardware.
Those wanting to try out this 2010-11 LiveCD release of Genode can find it at Genode.org.
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