Although I agree with you I wonder if it’s just an artifact of how we were trained to type. When I see kids type on glass they don’t seem to require this tactile feedback. In 5-10 years, basically when today’s 10 year olds are of working age, I wonder what we will see.
But I do understand we need good keyboards today.
Here is a small study that looked at it in kids: http://www.bradycline.com/2013/03/ipad-typing/