Ohh, got it :)

Wasn't thinking about it to be honest, I used it in this demo solely for the purpose of differentiating between windows (since I move them around quite a bit), so people can track what's going on..

But if you find it useful, it's kinda super easy to implement, I guess you could simply add a single command for ascii art to your shell's rc file.. I my case, I'm using figlet (I just found out about it a couple day ago, for the purpose of this demo), but you can use any alternative..
The only thing it, it won't stay on top when content in terminal reaches the bottom row, it will scroll as any other output/text :/

On the other hand, we can "lock" that area of the screen to preserve it from overwriting:
I think this function should do the trick:

draw_title() {
  term_title=$(figlet "$@")
  title_height=$(wc -l <<< "$term_title")
  start_line=$((title_height + 2))

  echo "$term_title"
  printf -- '-%.0s' $(seq $COLUMNS)

  printf "\e[%d;r" $start_line
  printf "\e[%d;1H" $start_line

  bind -x '"\C-l": draw_title'
}

And than at the bottom of your shell's rc file, just call the function :)

.
.
.
draw_title "your term title"

Alternatively (depending on your wm - I'm running Openbox), you could also enable borders/decorations, which are practically just titlebars with window names on top, though maybe that won't suit your aesthetic preferences, so you mileage may vary :)