Robots
Where the board starts moving things. LEGO Technic hardware through the Raspberry Pi Build HAT.
Being written
Motors — a motor started, driven and stopped, and then two of them steered from a gamepad's sticks. The Build HAT library drives these today.
Coming soon
These wait on the library rather than on the page. The Build HAT library has the hat and the motor today, and nothing else.
The distance sensor.
The light matrix.
Flight control — a drone's control loop, which needs the hard real-time guarantees that come after V0. It is the reason several of those guarantees exist.
Further off
Listed so the shape is visible, not because any of it is close:
Clusters — one program across several boards.
Networking — TCP from a program.
Services — boards talking to each other.
Debugging on the board.
Hard real-time.
Custom drivers, and calling C from Nylon.