The Nintendo group had come to demonstrate a prototype of the Wii, which had not then been released.
In the meantime, Sony has demonstrated a prototype of a 27-inch version, and other companies have O.L.E.D. sets of their own in the works.
Plastic Logic, a start-up based in Mountain View, Calif., also plans to demonstrate a prototype of its device at a technology conference in New York City on Tuesday.
At the Comdex computer trade show in Las Vegas last week, Microsoft's chairman, William H. Gates, demonstrated a prototype of the company's Tablet PC.
While E Ink demonstrated a prototype of its color display at the Computex trade show in Taipei last week, the current quality is not good.
Fattal's company, appropriately named Leia, will demonstrate a prototype of its new 3-D display next week at Mobile World Congress in Barcelona.
Syquest was demonstrating a prototype of its 1-megabyte Sparq removable cartridge drive for Macintoshes, which has been popular on Windows machines.
Mr. Miller will also demonstrate a prototype of the next version of AOL's software, AOL 9.0, which will illustrate some of the company's efforts to fuse its strength in online communications with its new emphasis on online content.
A confidential CD-ROM demonstrating a prototype of the service depicts a viewer arriving home in the middle of "Friends," (produced by Warner Brothers and shown on NBC) and restarting it from the beginning.
XM also demonstrated a prototype of its next-generation infotainment system, including a rotating on-screen selection that included an electronic programming guide, stock prices, sports scores and other information.
