Greetings, it is possible that an iPad could replace a laptop, but that depends on what you use it for. There a times when I need to use my computer for graphic arts, or web design. I haven't found an app that can do some of the things I need to do, but I already have the apps on my computer.
There are lots of games available for the iPad. I have only played one racing game on the iPad. It is one of the Need For Speed games. You tip the iPad from side to side to steer the car around the track. It is kind of fun. There are a lot of games in the AppStore that have trial versions so you can see if the game is something you'd like to have before you pay for the full version.
Have fun and don't forget to read the reviews of the games you would like to try.