You can now boot a Windows 95 PC inside Minecraft and play Doom on it – The Verge
If you’ve ever wanted to build a real and working Windows 95 PC inside Minecraft, now is the time. A new VM Computers mod has been created for Minecraft that allows players to order computer parts from a satellite orbiting around a Minecraft world and build a computer that actually boots Windows 95 and a variety of other operating systems.

Here’s another one, though all might not be as it seems.
Doom running in task manager with each CPU core as a pixel, supposedly – Boing Boing
In this footage, a supercomputer’s CPU cores — nearly 900 of them — are neatly lined up in the Task Manager. The Doom logo appears, generated by code that targets each core. Then Doom itself plays, each “pixel” generated by thrashing a core with just the right amount of busy work.
You’re right to be incredulous — the article goes on to explain how that video might be fake.