“We approached the logo redesign with a few key goals in mind.
“We wanted the new logo to be both modern and classic by echoing the International Typographic Style (or Swiss design) that has been a great influence on our Metro style design philosophy. Using bold flat colors and clean lines and shapes, the new logo has the characteristics of way-finding design systems seen in airports and subways.
Not sold on it 100%, however windows never have been known for their great branding. so i guess this is a improvement? 
‘Your name is Windows. Why are you a flag?
“It was important that the new logo carries our Metro principle of being ‘Authentically Digital’. By that, we mean it does not try to emulate faux-industrial design characteristics such as materiality (glass, wood, plastic, etc.). It has motion — aligning with the fast and fluid style you’ll find throughout Windows 8.
“Our final goal was for the new logo to be humble, yet confident. Welcoming you in with a slight tilt in perspective and when you change your color, the logo changes to reflect you. It is a ‘Personal’ Computer after all.”— SAM MOREAU

“We approached the logo redesign with a few key goals in mind.

“We wanted the new logo to be both modern and classic by echoing the International Typographic Style (or Swiss design) that has been a great influence on our Metro style design philosophy. Using bold flat colors and clean lines and shapes, the new logo has the characteristics of way-finding design systems seen in airports and subways.

Not sold on it 100%, however windows never have been known for their great branding. so i guess this is a improvement? 

‘Your name is Windows. Why are you a flag?

“It was important that the new logo carries our Metro principle of being ‘Authentically Digital’. By that, we mean it does not try to emulate faux-industrial design characteristics such as materiality (glass, wood, plastic, etc.). It has motion — aligning with the fast and fluid style you’ll find throughout Windows 8.

“Our final goal was for the new logo to be humble, yet confident. Welcoming you in with a slight tilt in perspective and when you change your color, the logo changes to reflect you. It is a ‘Personal’ Computer after all.”
— SAM MOREAU