Apple won't stop until its phones are the thickness of a credit card. It's sad, but Apple seems to have a case of body dysmorphic disorder when it comes to their iPhone.
technology is evolving. what do you think tech has been trying to do since it all started. making things smaller more compact. In the future you'll be happy with all the small tech out there and how light things will be. I wouldn't worry about the thinness of devices they will get better. the future will be thin thin thin everything