It was sega's last console and this generation because of monthly subscriptions to play online, abusing consumers and lying to them with "next gen power" both Sony and MS are losing a lot of customers (just a few days ago steam announced 125 million active users...).
If i was them i would thread lightly because the "amazing" ps4 sales are only due to Wii U's and X1 poor commercial perfomance but in overall sales this generation will end with many less home consoles sold than the previous one.