Why does your CS degree have an emphasis in Gaming?
Computer scientists study the theory behind a broad range of topics, including Operating Systems, Databases, Computer Graphics, Human-Computer Interaction (HCI), Distributed Systems, Algorithms, Complexity Theory, Mathematics, and much more.
To develop engaging computer games, you need all of those skills to be solid. For example, HCI experts study the layout of a game interface (where the buttons go, how mice clicks get mapped to the game, etc.); databases are used to store the mass amounts of information found in large-scale games - which, by the way, are often distributed. How do monsters find their way around walls to kill you? Algorithms, that's how. And how do you create and render all these 3D worlds, anyway? It's all based in mathematics.
That being said, the computer gaming industry brought in over $21 billion in 2008. It's a thriving area that draws in a lot of money.
Does this restrict your career to game development? NO. If you have the skills to develop computer games, you can certainly develop other things as well; or if you prefer, you can continue on to graduate school!