Seems like the right solution for legends.
The are not just static legends, a decent display can be used for a wide variety of useful purposes, and also useless but funny, think to a "keyboard saver" or to a keyboard virus with all the keys randomly scrambled or falling, matrix style..
Yes, please.
I'm now, probably at the 10th year of backlit only keyboards.
I really cant think to use a non backlit one other than for affective/historical purposes.
BTW an EL or e-paper low end version can be handy in the office environment.