It depends what you want to do ...
In the past "consoles" or "terminals" were hardware pieces consisting of a screen and a keyboard, magically connected to a mainframe where the actual software ran. The screens had a certain layout, like 80x24 characters. (I think there were smaller ones with 80x22, but I'm not sure)
All (not quiet sure, but I strongly assume so) the old roguelikes were made to run on such terminals.
Now we face an age where character terminals are emulated on graphical screens, and there are no hard size limits anymore.
So if you want to stay traditional, do 80x24
Since almost no one even remembers such terminals, I'm not sure if it makes much sense to stay within those limits.
My personal idea is, that if one uses ASCII, 80x24 is part of the tradition.
Otherwise I'd suggest to use graphical tiles, more or less abstract but symbolic and not care about the old terminals and traditions, but try to find synergies of deep gameplay and symbolic presentation instead of non-symbolic-abstract glyphs.
Fenrir may have a word or two on the idea of tiles and the abstract beauty of non-symbolic presentations. (No kidding.)