Re: Was there something similar then? YES
Chris, you really should try harder than just mention and provide Google glass pic, there's the earlier 2009/2010 Motorola Kopin Golden-i headmounted computer system that Google got the idea from
but OC there's more to choose OC....
its not even hard to find prior art if your an old Mac emulator user (older than many I whatever users have been alive never mind since i something existed ) ) on the AMIGA platform that ran the mac OS faster that the real mac and the AMIGA hardware devs that that later made their licensed faster PPC mac HW upgrade cards that were also faster that the original hence Steve killed them off after his return :)
for example the ,mans is Dr. Jonathan D. Waldern, the device is the headset with 'VIRTUALITY' embossed across it
and here's some of his papers
and some of his patents
theres plenty to invalidate most apple patents if you look