Just can't justify spending £4,000 or whatever it was on one. £400, maybe. The content I saw demoed (shape puzzles, mazes, etc) can all be done with paper, or maybe by printing stuff on to magnetic-backed paper for that stick-to-the-table effect. £4,000 would buy you a lot of magnetic-backed paper, and enough for whole classes at a time, rather than a table that you can fit 70 fingers worth of people around at one time (figure is accurate - we ran tests :-))
The Microsoft Surface PC on Edugeek's stand was also very, very impressive.