I have a windows laptop for games and movies or non work stuff. My company have provided me a laptop which I use only for work. Basically I play games when I am bored especially on Saturday and Sunday. There is not much setup needed when you are working from home.
The only thing I would change would be to get a play station or Xbox to play games with better performance and super detailed graphics. And have speakers setup like a home theater. Also get a Chromecast to watch movies or sports.