It looks really nice. That said I don't see how this interface is better productivity -- unless your work consists entirely in reading mails and surfing the we

It looks really nice. That said I don't see how this interface is better productivity -- unless your work consists entirely in reading mails and surfing the web. Also I don't get why UI designers hate "folders" and want to replace them with "tags". Personally I don't think you can beat a good old file system with a bunch of tags. Of course the file system requires some effort on the part of the user to keep things organised, but then again so do tags.