About Windows 12 or Later?

Hello,

     I noticed in websites run by experts that Windows 12 or later is available, and Windows 13 on an unknown date?.I found one such website run by an expert who was giving away Windows 12 full version in an iso format,complete with images and videos to back up the claims.My computer had no issues downloading and then installing the Windows 12 iso,and after it was installed,was dissapointed to find it was just a demo version and could not make any changes at all.I simply uninstalled it ,and went back to my original Windows 11 version instead.Now there's newer websites run by experts who claim that the is going to be Windows 13 out on an unknown date,and further claims this newer version is way more strict than that of Windows 11,and it won't be possible at all to install Windows 13 on an unsupported computer.The owners of Windows 13 have added something extra in that Windows 13 iso,that wasn't in Windows 11,so that whoever has an unsupported computer won't be able to easily install it,as claimed by those experts?