I understand, but what makes the pinetab so nice is that you can switch a OS by only throwing in another µSD-card. So If you want to run your media isolated from your other stuff, you can use a LibreElec SD-card. Or you want to play your ancient games through a emulator and you need the maximum of the resources to play them full speed, you can use Lakka. If you have a home party and you want to control your music with your tablet without the risc visitors start sniffing in your personal documents you can use a squeesebox OS.
Maybe my point is not so clear, but I have a LibreElec-box connected to my TV. Why didn't I put a ordinary PC next to my TV with Kodi installed?