There are some valid points, but I don't mind the ribbon, and just hope it works better than the current Explorer, and doesn't crash and lock files all the time like it does now.
As the author wrote, Microsoft does seem to be "hedging their bet", by enhancing the old complex UI while introducing Metro as the new. Is there any other way to do it? If Microsoft abandoned the 'files' centric view, how do I and everyone transition with our existing files? Microsoft sells to businesses and IT, so they always have to think, how can I ensure that a business will migrate to a brand new metaphor in the middle of a work week, risk downtime and even loss of data if they aren't vigilent, and buy our OS? I think they have to enable a transitional system, if they really expect businesses to move to Windows 8, and give the ecosystem time. If the new UI is better, then people will build on it, and will just naturally move away from the old.
Add your 2¢