It's difficult to argue that touchscreen isn't more natural in some sense. I've seen a 2 year old competently use an iPad to access media and play simple games

It's difficult to argue that touchscreen isn't more natural in some sense. I've seen a 2 year old competently use an iPad to access media and play simple games. Programming seems to require a more sophisticated UI though, so I worry that touchscreen people will be even less inclined than usual to hack on internals, etc.