Yes. Metro as a design language is essentially a style guide that appears to be defining a large number of current sites in the way the "Web 2.0 look" did back between 2005-2009 (rounded corners, gradients, Verdana, etc.)

Yeah. I'm a UI Designer and I really like the aesthetics of this sort of interface, although I'm not totally on-board on reducing the total content on-screen in favor of endless scrolling GIGANTIC TEXT and images.

It's good for browsing but terrible for finding something specific, which is why it's a good interface for Pinterest and a terrible interface for Windows 8. It's probably a good interface for MySpace 2.0.

The big thing about it is the horizontal scrolling.. that works really well on an ipad, but not so well on the screen. This is definitely a tablet-oriented design ...

Can you explain more why? My monitor is 16:9, my iPad home button suggests is should be held 3:4, and at best is 4:3, which is not as well suited for side scrolling as modern monitors, which are wider than they are tall.

It's as big of an issue on my OSX touchpad devices, as I can scroll sideways with the same gesture I use to scroll vertically. But on any device where my primary HCI device is a mouse, it requires finding the horizontal scrollbar and click-dragging it. It's also not typically what people expect out of a website outside of the touch realm, which breaks a pretty primary rule in UI design (don't present the user with something they don't expect).