Sorry I used incorrect terminolgy,
Let me explain, The Adjective Sick, has been long used to describe something that is ill or not feeling well. Some people have also used it to describe something outrageous or unbelievable.
For Example,
Skateboarder A: Hey Man, did you see me grind that hand rail in front of the library?
Skateboarder B: Yeah Bro, That was Sick!
Now let us take a look at our example:
If you've got a GameCube, pick it up! It's sick on the Big Screen.
Here is the above comment edited for Drediock:
If you've got a Gamecube, pick it up! It's an excellent game and looks great on my 65" Big Screen TV.