I had an opportunity to visit BBC news studio and even play with a professional camera used for live shows. It is hard to imagine what it's like if you've never been there - high tech equipment, a hundred of different lights above you, special table with screens hidden under the surface but visible to presenter. And it is very green with suitable graphics added on screen depending on the programme. Most of the technology is controlled from a separate room called gallery.
I have to say that playing with professional focus and zoom devices on a camera made me feel very jealous. I do not have this on my DSLR camera!