Quoting Roloccolor, reply 3its hard these days to unerstand the level of potection and law when it comes to UI´s...
No, it's quite easy.
Whom-ever can demonstrate the originality of their design can claim inherent copyright.
First in best dressed.
Permission can ALWAYS be sought.
It 'may' not always be granted.
That's life.
Thats what i mean... if you start working on your "project" that you do from scratch but the original idea came from something you had seen while its not under any protection or copyright and you release it as freebee and the original creator then decieds to make it worth the invested time ( because he notice that many people are interested in it ) he/she could/would be still able to sue you... That was what i meant to say im not sure how its called for the US but we still argue about ACTA and the consequences that come with it...
@Wizard1956 i wouldnt mind having a style closely to it that is transparent and can apply a soft gradiant of your choice from the top bottom left or right, i also agree that i dont want to be forced to live with a metro style forever on my desktop that is why iam fan of SD/WB
But i do enjoy webpages that are not overstuffed if thats the word like the new HP of Stardock it is overviewable and fast and the "metro look" like in the OP screenshot is one of them.
@Jafo - It 'may' not always be granted.

or unless you invest enough green paper