The current (and in fact first) Macbook Airs were lovely when first introduced, but seem a bit dated with that huge bezel. Sony's premium Vaios, Samsung's series 9 Ultrabooks and the Thinkpad X1 Carbon are among the best of the rest but I think the notebooks that come closest (but imo still far off) to the rMB design-wise are the rMBP and Dell's 2015 XPS13,
The XPS 13 has an incredible display and tiny bezels (pics from The Verge):
The side-on profile lets it down imo
The rMBP
The rMB's bezels are bigger, but the notebook looks sleeker yet sturdy, love the space-gray
The XPS 13 has an incredible display and tiny bezels (pics from The Verge):

The side-on profile lets it down imo

The rMBP


The rMB's bezels are bigger, but the notebook looks sleeker yet sturdy, love the space-gray

