I... don't hate it. What's wrong with me? It's bold, it's fresh, it does a pretty damn good job of shrugging off the Microsoft of the past 25 years.
Also, the controls on the carousel[2] are off.
This is not just fanboy hate, but for a company the size of Microsoft, their homepage should matter. These two examples show that they just don't care.
Unrelated to this, I find the metro style interesting for touch devices, but adopting it as the look of the whole company dumbs down their entire product. Also, the font looks to me like a futurist Comic Sans.