Games are a tool to help the brain complete tasks in a more enjoyable way. Some tasks include Fun and Development. Fun doesn't seem like a task but it is necessary for the brain to "reset" from the stressors in your life. Games provide a distraction that lets you forget about the bad things in your life for some time. However too much can be bad because you lose sight of the reality around you. Games are only supposed to be used in limited quantities.
Development can occur when playing the right kind of games. Shooter games will probably not give you much other than enjoyment but a good strategy or puzzle game that gets your mind thinking will help significantly more. There are websites that specifically design games to target certain aspects of the brain to enhance their functionality. Sometimes games can be social, such as MMORPGs, board games, or playing pretend. Playing games are vital to younger children.
Games allow them to have fun and learn at the same time. As we get older games change in definition. Little kids may think of games as tag or pretend, teens and young adults may think of games as video games or sports, adults may think of games as a enjoyable distraction like walks or physical activities or even small challenges and goals. The presence of games will always be there, even if we know it or not. Too much of a good thing can be bad so make sure to look up at the world and take a good look around every once in a while.
While games are around one thing is clear. They will provide the necessary foundation of learning in younger children, and give us the distraction time that we need to reset. Sometimes games will give us a new perspective on things or help us change or decide on something in our minds. An example is that a four year old little girl was still sleeping in a crib and sucking on a binky. A friend mad a simple game that has a T-chart and Velcro pieces of paper. On the chart it had "Baby | Big Kid" and the pieces of paper had a crib, bed, binky, underwear, diapers, and other objects of the sort. The object of the game was to put the objects in the right category of the T-chart. She successfully put all of the items in the right spot and was eager to stop sleeping in a crib after the game. This is a good case to make my point, which games are very important in different ways for different people and are certainly not pointless.