Windows Terminal will become the default command line experience in Windows 11 soon
An additional change that Microsoft is planning is that it is switching the default terminal app in Windows 11 to Windows Terminal. This modification will be rolled out in 2022 via the Windows Insider Program first before being made available generally. Microsoft hasn't defined a firm timeline as of yet, but it's clear that we can expect this to happen sometime next year.
That would mean the end of the regular cmd.exe, which is currently the default command line in Windows. Of course, the new Windows Terminal application includes cmd.exe as an option as well, so it's obviously not like it's going away.