Kitty's ability to display is quite fun (although it is definitely not the first terminal editor to do so).

A while ago I hacked a Julia package together so that functions that emit an image (for example a plot that would usually be displayed in a Jupyter notebook or a new window) show that image in kitty. It's still a bit rough, but it is surprisingly easy to write something integrates with a lot of packages: https://github.com/simonschoelly/KittyTerminalImages.jl