Over the past year or so Teamwork in games is becoming more and more common. Some of these games are gaining a lot of popularity as well! For example, look at Transformice. Transformice is a game that is solely set on the idea of teamwork, and yet a lot of people play it daily. Another example is die2nite. Die2Nite is a zombie game where real players have to work together in order to survive a zombie attack daily.
Is this a sign of new games to come? 
I actually played Transformice, and while I was totally confused at first it is actually quite funny and fun. It just reminds me that groups of people are like lemmings and if one person jumps off a cliff a few people will follow lol. Check it out if you got a few minutes of random boredom. It will be good for a few laughs.