They're not going to replace the keyboard design. They might make a third gen butterfly, but I don't see it going further than that.I don't think Ives has the capability to understand what you wrote. In his mind thinner is always better
(even though physically, he is thicker than he used to be).
I think a nice compromise between thin and decent travel is the magic keyboard, but I'm not holding my breath they'll incorporate it in the MacBooks.