A reader with much better eyes than mine (think i should really visit my ophthalmologist) found an interesting reference to Solaris/SunOS in the new Tron Legacy Trailer:

It’s at 1:12 in the trailer. SolarisOS 4.0.1 Generic_50203-0<somedirt>un4m i386 Unknown.Unknown The architecture is interesting: sun4m. That’s something in the range of a SPARCstation 4 to SPARCstation 20, several Lunchbox systems had the same architecture and finally SPARCserver 630MP, 670MP and 690MP were sun4m, too. The production of those systems started in 1989.