But are you willing to wear a front-heavy pound of tech on your head all day for that? Maybe you are, but I wager few will. The counter then is that the tech will get more compact and lighter. Well, maybe, or maybe not as much, let’s see in a couple of years.
If there’s a good “why”, the “how” is merely iteration and execution. Apple has been known to be extremely good at materials science and hardware engineering so if it’s within the bounds of physics and economies I don’t think that’s remotely a concern.