I agree: running simulated computers inside of Minecraft is a significantly more impressive technical feat than bolting on display surfaces to planes with a mod.

There's a big difference between something being compiled to run inside of Minecraft, versus running a sidecar that streams back a display. It's the difference between compiling and running on your machine, and streaming back a cloud machine using RDP.

Not like this makes a difference to users, who don't know how any of this works. But we are on Hacker News...

People not only built a functional computer in Minecraft, people have run Minecraft on that functional computer in Minecraft. Extremely slowly, obviously, but it did technically work.