I've actually been into this sheer/transparent/delicate type of clothing items such as blouses/tops and dresses. The disadvantage with delicate pieces of this kind, they tend to be prone to damage and impractical to wear and sits in the wardrobe most of its life, like my collection, of wonderful silks, french lace and other fine delicate clothing pieces. I'm collection of fine tops and dresses, and will continue to buy such pieces.
Have to agree PrettyPearls, you do have to be careful how you care for and store it! I like Natalie Portman's dress, though for me I think the lace would be better off as a block-colour sheer fabric - somehow the lace and bright blue don't quite work that well.
Yes, she's very pretty, and I do love the colours, but it would have been better if the lace worked with the overgarment better - I agree Tania, block-colour might have been better. And it is a lovely necklace but its not working that well here. There's too much already going on with the dress to have included such an interesting piece (in the wrong colour too).