I gotta love it: Clothing that communicates with computers to convey position and movement. One moves and the clothing communicates with a computer that records the changes in the physical situation. Bam! Wham!
It could be fun for tennis or other sports. But it could be even more useful for building reinforcement routines for people who have movement disorders. Shades of Randy Pausch, with whom I had the pleasure of working in the 80s when he was developing a way to permit people with limited movement (e.g., cerebral palsy) to use a specific movement (e.g., an arm wave) to control a cursor.
Check here for the Slashdot entry about developments in clothing.