Apple's slim, trim Titanium PowerBook G4 is now in its third generation. In the notebook's most recent revision, Apple has kept the eye-catching, elegant form factor but added a faster processor with 1MB of DDR L3 cache, a bigger hard drive, a more powerful graphics card, and a higher price. Combined with a bright, crisp, 15.2-inch, wide-screen display, this package makes the PowerBook a compelling alternative to a desktop computer, not to mention a Windows desktop-replacement notebook.