If it were merely an all-in-one desktop, Hewlett-Packard's Concept PC 2001 would be impressive enough: Inside its 18-inch LCD is a 48GB hard drive, Pentium 4 processor, CD-RW drive, Bluetooth module, Webcam, and speakers. But it has many more tricks up its screen. You can pluck the monitor from its stand and unfold it into a traditional laptop -- or turn its display away from you for presentations. Finally, it also transforms into a tablet PC, complete with a touch-screen. Though Hewlett-Packard has no plans to produce the concept, the company will integrate some of its features into future products.