No you were right to be disappointed! I was similarly in a state of excited awe to see someone play actual quake inside the notch of a mac. Much like the noble hacker tradition of getting Doom to run on the most unexpected devices possible. So yes, ID Software games running in weird places is an entirely reasonable expectation!

'just a terminal' is maybe also a legit term of art and entirely useful for somebody out there. But much less cool that we were hoping for!