Jeremy C. Reed writes:
> 
> But do these new IBM mainframes still use or require IBM 3270-class
> terminal/keyboard/emulation?

If they run an OS.

> Will regular telnet work? 

It only works for the "OpenMVS Unix Services" or whatever.  You can't
just telnet into MVS and get anywhere.  It certainly doesn't have a
termcap or termlib!  All of the world is a 3270 terminal.

> Does tn3270(1) really have any value with recent or future machines?

Definitely.  I use it a few times a week when I don't have access to my
"GUI" based tn3270 programs.

-Andrew