I must admit that my first re-action to the thought of a TV screen in a lift was one of enormous horror.

But seeing shona's lateral contribution reminded me of the peasure that I used to derive from looking at the adverts as I slowly descended into the bowels of London's Underground system.
I am aware that much of the pleasure depended on the nature of the adverts, about 60% of which extolled the glories of certain brands of corsetry, and my age - I was in my late teens to early twenties.
However, I did also take note of the other adverts as well, and didn't find the experience at all horrible. So maybe well-chosen advertisements would help to while away the minutes spent in verticallity.

And what a boon when the lift gets stuck.