@paco
What's really interesting is that there -is- haptic feedback on the iphone. It is not something you super notice if you're used to it, but it does provide a slight buzz when you press in a certain way, not a full motor thing but enough to get some data.

The androids have the same, but it seems more narrow (mine's just a buzz when I press a key).

But there's no reason this couldn't be incorporated in, genuinely. A set motion (half circle?) to make it buzz and change 'modes'