1. No one needs Windows 8 on the desktop.
This coming from linux columnists is just laughable. I think they are just upset that people still don't need linux on the desktop.
2. Metro: An ugly, useless interface.
Metro is very functional on Win8, and on Windows Phone. I would bet most of the people who complain about it have never actually used it.
3. Where are the Windows 8 Applications?
I don't know, where are the Windows 9 applications either? Windows 8 isn't released yet, and the big public preview isn't even available. To say where's the apps is just plain stupid. Do these people attend the MS developer conferences?
4. Vexed Windows developers.
Again, has this person ever spoken to a group of developers?
5. Too little, too late for the smartphone/tablet market
It's not too late for the smartphone market as we see a device like the Nokia 900 and WP7 got rave reviews from CES, and since iOS is becoming a very dated and overexposed OS, Windows Phone has a great shot.
Tablets are up in the air, but we haven't seen any real hardware yet for Windows 8, so this is pure speculation from a biased writer.