An OLED screen has nothing to do with space. How old are you? You like insulting people? What makes you so superior? "Do you understand physics? Features require space." Actually that's design and engineering. Supposedly Apple's long suit.
Yes, I expect great things. This is Apple, the purported leader in advanced design by their self aggrandizing dog and pony shows. Obviously the dual lens takes up more space. Look this is just a money grab by Apple. It's been their MO forever. Withhold features or offer options which force the consumer's hand to buy up. If you recall, the initial iPhone 6 didn't have optical image stabilization. It wasn't a space problem. It was a money grab.
The camera is an important feature on a phone. Apple makes a huge deal out of it. Maybe they should make it as great as their ads proclaim.