Question about Raspberry Pi 4 8G Basic Kit incl. HDMI + 16GB SD

You probably don't really "need" the Raspberry PI. But you can implement many cool projects with it, you can find endless examples on YouTube and Google. Drones, robots, measuring stations (weather / temperature, etc.), e-displays, RetroPI (emulators), SmartHome, web servers, etc. Or you can simply use the PI as a (Linux) computer.

What do you do with a computer?