I understand why people like this idea - when using an external keyboard, I sometimes find myself fumbling for a trackpad just below the keyboard before I think, "Oops...wrong interface!"
There's one good reason why Apple might officially support a trackpad somewhere in the future: it takes away one objection to the iPad as "not being a real computer." (The other biggie is lack of a user-accessible file system, but that's another topic...) Of course, the pointing device mustn't do anything a finger couldn't do, like actions on hover (on Macs and PCs hover often brings up a tooltip). Since fingers can't hover, the mouse shouldn't initiate any action until an actual click event is sensed.
My fear is that without some pretty stringent rules in place the touch interface would quickly be relegated to second place as developers already familiar with indirect pointer methods abandon touch-first in favor of direct ports of PC and Mac software. At that point, iPad loses its competitive edge against Windows - a platform with a lot of mouse-first apps but a real dearth of touch first apps.
There's one good reason why Apple might officially support a trackpad somewhere in the future: it takes away one objection to the iPad as "not being a real computer." (The other biggie is lack of a user-accessible file system, but that's another topic...) Of course, the pointing device mustn't do anything a finger couldn't do, like actions on hover (on Macs and PCs hover often brings up a tooltip). Since fingers can't hover, the mouse shouldn't initiate any action until an actual click event is sensed.
My fear is that without some pretty stringent rules in place the touch interface would quickly be relegated to second place as developers already familiar with indirect pointer methods abandon touch-first in favor of direct ports of PC and Mac software. At that point, iPad loses its competitive edge against Windows - a platform with a lot of mouse-first apps but a real dearth of touch first apps.