I don't see the need personally on an OS that's like what the PlayBook has. With a lot of BlackBerrys, the lack of a touch screen and/or a small touchscreen made it useful with that heavy menu+click UI.
Originally Posted by notafanboy
In these new devices, the paradigm is different and it's actually designed for a touch screen instead bolting one onto an OS never intended to be touch screen oriented. I can't think of a single time on the PlayBook UI where I've ever thought, "A trackpad would be great!"
Just my opinion, your mileage will vary.