Of course it will display more. Your operating system allows you to scale your everything up/down.You'll have the "space" of a 50" TV, but it won't display more than a 27" monitor. (They both have the same number of pixels.) The issue of "how much can I display?" is not a matter of the display's size... it's a matter of how many pixels is has.
By using 3x 27" monitors in portrait mode, I can display ~70% more bars than I can with a TV as monitor. And I make the text comfortably readable by scaling up the font.
Scale them to the size that is comfortable on your 27". Scale them to the same size on your 55". You can display twice as much and it works in portrait mode (of course it is up to you to figure out how to mount it). Anyway, I just scale everything until I like the size of the text.
Take care.