Apple Patent: Adjustable Screen Snake Arm
MacObserver notes that Apple has been issued a patent for a "display device with moveable assembly."
MacObserver reposted photos of the display arm from the patent application and resembles the LCD iMac with a (more) adjustable neck.
The patent was filed on November 8, 2001 which predates the release of the LCD iMac. This may simply represent an early prototype design rather than an upcoming product.