Scott from PC World gives us a preview of Windows Longhorn. He tested the 64-bit version of Longhorn build 5048 and posted his thoughts. Here's a snip:
The most recent build of Longhorn--Microsoft's next Windows--has some impressive visual touches, including the kinds of translucent objects found now in Apple's OS X, and more powerful ways of finding files. But it doesn't yet exhibit any breakthroughs in productivity, or promised features such as security improvements and smarter connections to handheld devices.