Question about Rasberry Pi though, I assumed the ones labeled with that were just the screen and you had to add your own Rasberry Pi or something strange
It is just the screen but you don't need to add the Pi, it's just that it may or may not have facilities to mount/connect a Pi more easily, or just marketed towards there because that's what most people would use this display size for. As long as it's got the usual interfaces to connect to you can normally use with anything though. There could be exceptions with monitors without EDID and relying on the fact you can easily force a resolution/refresh rate on the Pi but it's kinda rare and may be a hard to spot if you can't see the manual in advance.
As to wide ones like on the kickstarter there are a bunch on aliexpress, either encased or bare if you want to make your own casing.