Id agree its a commonly used term. Just because they call their system Playstation 1 2 3 4 5 6 whatever. So it sticks in peoples heads. Just like the words Gameboy do. And now Xbox is too. Just like nintendo did back in the NES and SNES days. But I think Nintendo is still the bigger more well know to people company.
"Name a gaming console" Playstation
"Name a gaming company" Nintendo