Thought I'd throw the image on the thread.
Its an obvious progression (but its not necessarily progress). I can see how the touch screen works on a number of levels (i.e. - firmware updates could allow for the addition new features or "buttons" or even a custom layout). However, I think they're underestimating the importance of tactile feel. Could you imagine someone like Karizma banging out something on a touch screen. At least they left some of the most used features as is. Perhaps Pioneer will leave dedicated buttons to the "high-end model".