If by people you mean devs and publishers, they will make games for platforms which have a large market share. Even assuming Sony changed their ruleset to allow PS4 Neo-only games (which is a huge ask), and PS4 Neo sells as many units as the base PS4 has from launch (so PS4 base and PS4 Neo units sold are 50:50 - an even bigger ask) what developer/publisher is going to consciously decide to target only half of the PS4 market and therefore limit their sales potential?
Also, Xbox One owners exist and like to buy games, too.