The Raspberry Pi is a cool one-board computer, modular, onto which you can hook up web cam, loudspeakers, external hard drives, all kinds of devices.
It has wireless and bluetooth connectivity, several USB ports, an Ethernet port. It has everthing I expect from a computer.
It can play music and movies, with the new Raspberry Pi 4 and its 8 Gigabytes of RAM, I can even do real development work without any problem, with tools like PyCharm or IntelliJ.
The different configurations presented here can be acheived for less than 150.00 USD. And they do work for real.
Note: The configurations presented below have small screens... But nothing is preventing you to plug in a big one.
Here are several configurations for a small Raspberry Pi based laptop, to be taken on the go.
Click on the pictures to enlarge them.
In its Pelican box, with a touchscreen (no keyboard needed). The Raspberry Pi is behind the screen.
With a wood and plexiglass custom case, a breadboard, wireless keyboard with touchpad, and a 7" HDMI screen
Putting things to work
Yet another config, in a waterproof box, with webcam, 5" HDMI screen and small wireless keyboard