Re: "Material Design?"
Yes, and no. You can certainly see both aspects of Metro and IOS 7 in the new Google stuff and this is as it should be. MS rushed Metro into all versions of Windows 8 and didn't think it through properly: tiles are an excellent approach as is large type and bold colours but they become a problem when you have a lot of them on large screen. MS also didn't invent the "stack and tile" approach.
The paired back icons and areas are definitely a nod to IOS 8 but seem less slavishly puritanical: I particularly like the thought given to (coordinated) transitions. Luke Wroblewski, as ever, wrote a great article on designing for IOS 7 which highlight that good design essentially iterative. This is as true for individual works as it is for frameworks.