*throws up hands* They modified the iPad to include magnets for a damn cover. I mean how much more frivolous can you get? My point was to show that while the ideal is supposedly fingers and and app, the abstraction is leaky and breaks down all the time to show other stuff. That ideal is not a good enough reason to remove all possibility of a pen.
I suppose I just see a clear divide between modifications made to support a case vs modifications made to the screen to support special hardware pens.
The smart cover makes the iPad less of a tech-y device and more friendly and obvious to turn on for a lot of people. that makes the engineering worth it to Apple. but it does not impact the way you interact with the screen. that's the key difference. that interaction always needs to be dead simple and obvious.