Windows 8 isn't ;p
It would be "alright" if a media student produced it for an assignment. Considering they probably paid hundreds of thousands for it, it's incredibly boring.
It's because it's cool to hate on Microsoft.
They've obviously changed it because of metro (which is also cool to hate, apparently) I guess in an effort to promote it.
Agreed, apple have it the right way around. Everyone recognizes the logo for the company, they don't even need a logo for individual products. Where no one recognizes the logo as microsoft, they recognize it as windows. Same with android, they recognize it as the Os. Same for most brands actually. How many have the companies logo first and foremost, rather than one product in their range.I think they really needed to do this ... they need an iconic brand image like Apple's "Apple".
Looks like a logo that took 3 minutes in MS paint.

Logos are meant to be simple
It's possible to do simple without being bland. This is just bland.
It's recognizable, it's been their windows logo for decades. It fits in with their whole theme. There is no shading or anything else. It's the modern look, which isn't just a Microsoft look, it's the new in design. Have a look at skydrive, outlook.com, windows8, even the new amazon website, has this new simplistic look.