Mathematically it works out.
If PS4Pro was a half generation 3 years after PS4 launch, then 2019 would see PS5 but I think it's too soon. Although the it would give them a year on MS.
There's only 2 races: White and 'Political Agenda'
2 Genders: Male and 'Political Agenda'
2 Hairstyles for female characters: Long and 'Political Agenda'
2 Sexualities: Straight and 'Political Agenda'