At the end, uxn is demoed a bit. From the design document:
As it stands today, modern software is built with extreme short-sightedness, designed to be run on disposable electronics and near impossible to maintain. We decided to not participate. Our aim is to create a machine that focuses on answering the handful of little tasks we need, which is centered around building playful audio/visual experiences.
Uxn was created explicitly to host software on pre-existing platforms, the design was advised primarily by relative software complexity, not by how fast it could run on new hardware standards. Features were weighted against the relative difficulty they would add for programmers implementing their own emulators.
The rest of that page and the whole project is worth checking out.