"I have 3 from 4 PS4 home consoles (I didnt own only PS3)"? Excuse me? Sorry not sure what you were trying to say there, none the less I understood the rest of your sentence and it is why I said most not all. There are obviously many who didnt play Infamous 1 and 2(good games) or Horizon which is fairly new, but I would say a very large portion of PS3 users know who sackboy is as he was the mascot for the little big planet franchise which was fairly popular at the beginning of the PS3 era and had a few spin offs/sequels.
Point that only because I missed one Sony console and didnt still play one of newer PS4 games (Horizon) means that I dont know who are those characters, means that characters cant be mention like strong characters in any case. Not to mentione, that we have Infamous and Big Planet game on PS4 also, but you need to play those game in order to know who
Sackboy, Aloy and Cole MacGrath, on other hand you know who are characters like Luigi, Toad, Yoshi, Kirby, Donkey Kong, even if you didnt played those games.