Simply because it gives, in my not so humble opinion, the best representation of the relationship between Edward and Bella:
He, looming, blatantly intruding her private space and generally exerting a control-nature, cutting her off against the outer world. She, giving in, all to readily submitting and letting herself be cut-off.
It is a long standing argument if the Bella & Edward relationship is a abusive one, it certainly does show the markings for one. But it is a realistic set-up, too; we do often see this phenomenon of divorced children actively seeking a controlling partner, one that takes command over them. Viewed in that light it is natural for Bella to fall for someone like Edward.
This part from eclipse (third book in the twilight saga), which would have any self-respecting woman ditch him without a moments hesitation, tells us all we need to know about Edward’s character and thus tells us all about Bella:
(Edward confronts Jacob, whom Bella hit after he force kissed her)
“…if you ever bring her back damaged again – and I don’t care whose fault it is;
I don’t care if she merely trips, or if a meteor falls out of the sky and hits
her in the head – if you return her to me in less than the perfect condition
that I left her in, you will be running with three legs.”
How many times do we get to see in movies these typical ‘Hollywood-rooms’ that practically scream out to us: Nobody ever lived here!
No Reservations is a notable exception from that rule, not in that it wouldn’t feature this typical movie trope, but in that it here for once serves a valid point. This is not some Hollywood decorators futile attempt at creating something that looks art-noveau, here the room shows what the character hides from us and herself. It’s the emptiness of her living quarters that betrays the fact to us that she’s not living, she’s only functioning. The rooms décor, or lack of, becomes a central metaphor for the character:
Kate (Catherine Zeta-Jones) is a character who has build out her own prison, she regulated her life to a standstill which shows in the sterile rooms she dwells in. It’s not before her life gets shaken up and the perfect order broken that she begins to live.
This view of her lost in the emptiness of that corridor is the sole key we need to understand her character.