Diablo 3's Seasons are currently exclusive to the PC version of the game. Blizzard indicated in a new interview that consoles could get that feature soon, though.
In Diablo 3 Seasons, players create new characters from scratch to complete Achievements and exclusive objectives called Conquests. Leaderboards track the top performers throughout the world. By participating in a Season, players can acquire exclusive Legendaries and cosmetic items.
When Blizzard first released Seasons on PC, they said that they had no plans to bring them to consoles because of the "offline and disconnected nature" of those platforms. Unlike the PC version of Diablo 3, the PS4 and Xbox One editions don't require a persistent Internet connection.
Senior game producer Rob Foote explained the development team's change of heart to IGN this weekend:
The initial feeling was with consoles, because of the way it’s set up, it can’t support leaderboards and the online community isn’t the same - there’s a lot more playing with friends on a couch rather than in a general community - but it is something we recognise that a lot of players have given us the feedback in the last year.
I think Foote's right to say that the leaderboards aren't the important part of Seasons. Most players can't and won't be topping the charts. The real incentive for playing Seasons is to get the exclusive loot. It can't be that hard to let PS4 and Xbox One owners earn those items.
Blizzard balanced out the good news in the interview with some bad news. Senior technical game designer Wyatt Cheng suggested that they won't be developing any additional player-versus-player content for the game. He said that PvE is the "best part about Diablo" and that trying to balance the game for PvP hurt the PvE side of the game. For example, they wouldn't have been able to implement a lot of ideas for Legendaries if they had to worry about their effect on PvP:
Now we did introduce PvP brawling and we invited players to go into the Arena, do it and try it, and I think what you find when you go into the brawling arena that the Legendary powers that are amazing and make you feel so awesome when you’re attacking monsters making PvP no fun at all.
That's probably not a huge surprise to Diablo 3 players. It's been clear since launch that player-versus-player is a low priority for the team. The developers would rather players compete through their Season accomplishments rather than directly fight each other.
Diablo 3's Season 4 will start later this week. You can find out what new rewards this Season will offer here.