It supposed to help you to reach the top of the screen with your thumb when you have small hands and hold the iPhone with one hand. Apple implemented this when they started to sell the MAX version of the iPhones. Having a big screen, people started to complain because they can’t reach the top of the screens holding the iPhone with one hand.

Turn it off. Go to Settings -> Users -> Default User -> Photos -> Off.

I don’t think Apple would be interested in the console market, it is too competitive with Sony Microsoft and Nintendo and it is too small comparing it vs. the mobile gaming market, on which they are. Why compete for a 30 maybe 40 million devices if you have sold more than 2.32 billion mobiles devices up to date, of that 1.46 billion are active.

They are. The iPhone and the iPad are a powerful mobile devices.

Why is the need for the upgrade?