If you need to work on cluster, is nice to have syncronized terminals to send the same commands in parallel.
Is it also doungerous, so do some test before sending a bunch of vi commands!
On Unix, a cheap and fast solution is Kde “konsole” which has such option.
Look under “View/Send input to all Sessions” menu and try it out. I was happpy with version 1.6.6 of konsole.
I am not a fan of “xterm variants”, but konsole looks great.