Recent stylus article on the Verge notes that stylus's are the top selling tablet accessories. The number and variation of products and vendors show that someone is putting a lot of thought into writing on the ipad and other capcitative tablets. Still, capacitative stylus's can't really compete with wacom active digitization pens availible on some android and windows tablets. Does the ipad need active digitazation? Is it likely this feature will be included in ipad 4?