Pen computer - Concept or reality?

Recently I had received from a friend a set of photos that shows a device that is described as a pen-size computer with keyboard and monitor projected on flat surfaces. I found this concept intriguing and shared it with many of my friends by email. Many recipients have responded and expressed from awe to caution and doubt. So I inquired about the origin of this technology information and whether it is more than a concept. Here is what I found:

The particular set of photos is around only in a number of blogs since approx. 2005. It is available as a video slideshow on YouTube since April 27, 2007, and has since then 54,000 views. You can see it at http://www.youtube.com/watch?v=8ptixSbHzJ4 The video/images are discussed daily in a stream of comments attached to the YouTube viewing site and range from informative to obnoxious. Some posts claim the PC is already available in Japan,others characterize this as a hoax. I could not find any proof for reality or commercial availability.

However, at the 2003 ITU Telecom World exhibition held in Geneva, the Tokyo-based NEC corporation displayed a conceptual prototype of what they dubbed a "Pen-style Personal Networking Gadget Package," or P-ISM. As NEC described the P-ISM:

P-ISM is a gadget package including five functions: a pen-style cellular phone with a handwriting data input function, virtual keyboard, a very small projector, camera scanner, and personal ID key with cashless pass function. P-ISMs are connected with one another through short-range wireless technology. The whole set is also connected to the Internet through the cellular phone function. This personal gadget in a minimalistic pen style enables the ultimate ubiquitous computing.

The P-ISM system was based on "low-cost electronic perception technology" produced by the San Jose, California, firm of Canesta, Inc., developers of technologies such as the "virtual keyboard" (although the last two pictures shown above appear to be virtual keyboard products sold by other companies such as VKB rather than components of the P-ISM prototype).

The information from the exhibition was posted in December 2005 by B. and D. Mikkelson at http://www.snopes.com/photos/advertisements/pcpen.asp I cannot verify that the P-ISM is the device shown in the pictures of the "pen PC" in the video. I did not find websites or information about such technology on websites of the quoted companies. So for the time being it looks this is a just a concept and not a product that we can buy in the near future. If somebody sees/hears otherwise, you input (e.g., as a comment here) would be highly appreciated.