URA has a similar implementation in an exhibit .... but i do not
believe that the above are actual prototypes yet, they are artist
impressions.
miniature projection technologies have not come to this stage of
miniaturization to provide a readable projection at 200-300 lumens
from a pen sized emitter. it would seem the artist impression is
quite accurate, you need very dark room to see it being projected.
drawing from currrent CCD technologies, at you will only get SVGA
res. laser rendered keyboard from a pen sized renderer still not
possible, current precision actuators to create such a accurate
keyboard picture will probably be the size of a supermart laser
scanner still, not to mention the sensor array... fingers cannot
rest on "keys" otherwise input error ... 
