They do! But those IR touch screens are actually different technology again from the quite literally cameras that the Surface used. IR touch screens like the o

They do! But those IR touch screens are actually different technology again from the quite literally cameras that the Surface used. IR touch screens like the ones the Sony reader and Kindle use have been around for ages in POS machines and the like. On the other hand the Surface (table) was using computer vision algorithms on realtime near-IR images of the table surface to recognize multiple touches and gestures.