I feel like they're giving a free fighting game because they understand their market. The biggest worry people have before they try it is latency, but almost everyone that's sat down to play it so far has talked about how it feels nearly indistinguishable from a console latency-wise.

A game that demands low latency (like a fighting game) is a great way to demo how noticable (or not) the latency is on your setup before you buy any other games that need little to no latency to enjoy.