Serge is a gamer and has an older ATI gaming video card. He's wondering when he should upgrade it. There are two things to consider in terms of video cards. Cost, and whether the system is powerful enough to justify a more powerful video card. If the GPU is more powerful than the CPU, then he'd be "CPU-bound", meaning the CPU would be holding him back from getting the most out of the video card.
If it can handle it, then it depends on when the next generation card is coming out. The current generation is almost a year old. Leo says that it's really not necessary to wait. The Radeon 6800 series is a great card and will give him the most bang for his buck.