Actually, we where planning to have an OS 4 demonstration on the show running on the CyberStormPPC (not 68k). We almost made it, but ran into a problem with the PPC accessing custom chips - it seems a flaw in the CyberStormPPC hardware can cause a complete hangup of the system when certain conditions are not met. "Unfortunately" the emulator is fast enough to cause these conditions :-)
It was rather easy to work around it once the problem was identified, though. Just didn't happen in time to prepare a demonstration.