Source: Windows Blog
quote: The "old" style Windows user interface that's been around since 1995 was that way because it was the most efficient UI for people using a mouse sitting in front of a PC. Microsoft used it, Linux used it, and Macs used it. It just worked well. My iPhone uses a completely different UI and that's ok with me, because it's a small touchscreen phone. Its UI matches its function. Windows 8 feels like a tablet OS on a desktop. It just makes no sense.